Volcanoes and Earthquakes Research Paper Example | Topics and Well Written Essays - 1000 words

Volcanoes and Earthquakes - Research Paper Example Earthquakes have caused widespread damage to human life over the years. There have been earthquakes that have wiped away generations, cities; only to be found later by geologists and historians. With the advanced technology, it has become easier to measure the magnitude and the origin of the earthquake with immense accuracy. Predicting earthquakes is still a mystery and they always catch the human race by surprise.Earthquakes are caused by the shifting of tectonic plates that are present under the Earth’s surface. The ground we consider rock solid, is made up of plates that constantly keep shifting, occasionally shifting rapidly, causing earthquakes in that region. This movement of plate’s releases stress along the geologic faults. These fault lines are considered the boundaries between two plates. It is along these fault lines that earthquakes occur. Interestingly, Earthquakes can also be caused by human activity such as mine blasts and nuclear testing. The epicenter b eing the exact point on the earth’s surface, under which at the hypocenter is present; hypocenter being the exact point where the movement took place (Caroll, 1997). The thought of volcanoes, brings a mountain with erupting lava in our minds. Volcanoes are almost always associated with fascinating destruction of nature and their blinding rage of destroying everything that comes in their way. However, geologically, a volcano is any opening on the planet’s surface, from which the molten lava can make its way to the surface. From fissure vents to submarine volcanoes; all openings in the earth crust the spew out lava are termed as volcanoes. There is classification based on the kind and composition of lava that comes out of the fissures or openings (Sengupta, 2007). Volcanoes are also classified on the basis of their activity; they are active, dormant or extinct. Active volcanoes erupt regularly with many eruptions scripted in the human history; these eruptions may be mont hs apart, years apart or centuries apart. Dormant volcanoes are the ones who have been quiet (no eruptions) for a long period of time, with no written records of their activity until the day the activity starts again. Extinct volcanoes, as the name implies, are the volcanoes that were active some time but have no activity happening as there is no lava supply (Carol, 1997). Volcanoes and Earthquakes: Relationship? The relationship between the volcanoes and earthquakes is pretty significant. On the face of it, there might not be enough evidence, however, when one studies closely it is evident that one of these surely can trigger the other (Rafferty, 2010). Earthquakes generally occur at tectonic plates and most of the eruptions occur in these volcanic regions only. The movement is caused by

Gone With The Wind paper 5 Essay Example | Topics and Well Written Essays - 1750 words

Gone With The Wind paper 5 - Essay Example Thus, copyright law though protects originality and creativity of the authors, gives room for rewrites by providing exemptions under which they are not entitled to infringement.However, this has also created a room for copyright conflicts and other related issues. Numerous copyright issues have dominated the debate scene prompting the question as to what should be considered fair use and what should not. One notable copyright battle was between Gone With The Wind (GWTW) and The Wind DoneGone (TWDG). In this case, the author, Randall rewrote the GWTW by retelling the story through a slave’s perspective. This encompasses writing back to society and power, which has a rich contribution to the society. Nevertheless, the conflict here was whether TWDG violated copyright laws by copying GWTW. Through evaluation of free speech, fair use, parody and satire, it is clear that TWDG did not cause infringement of copyright laws. The infringement law allows rewrites based satire and parody. As a result, there was no infringement in the case of GWTW and TWDG since the rewrite was based on satire. Nevertheless, when solving the conflict, other concepts such as free speech and its application also came up. Thus, it is essential to understand how fair use, parody and satire, and free speech apply in rewrite cases. ... This marked the beginning of a long-term battle on TWDG’s infringement of copyright laws with regard to the rewrite of GWTW. Nevertheless, what arose from this case is that fair use sets the legal framework that accommodates both commercial and creative decisions. In analyzing a literary work or any other thing for fair use, there are four factors that play a key role in the determination of fair use. According to Netanel in Making Sense of Fair Use, these are provisions of Section 107 of the United States Copyright Act (Making Sense of fair Use 715). The first factor deals with character and purpose of the uses, for example, it considers whether the use is for nonprofit educational or for commercial nature purposes. The second factor provides for the nature of the work copyrighted. The third factor looks at the work copyrighted as a whole and determines the substantiality and amount of the portion used with respect to the entire work. Finally, the fourth factor provided for b y the US Copyright Act under Section 107 looks at the impact of the rewrite on the potential market, and how the copyrighted work is valued. Beebe notes that the four factors are a test that must be applied in every case to determine fair use, and there is no bright line rule that can determine the issue of fair use (558). The major goal of fair use is to provide a flexible approach of determining and making a decision as to whether fair use applies in a particular case. The major concern is whether the use of the original work that is copyright protected is fair or not. In addition, the fair use doctrine does not base its arguments on equity, but is rather a creature of the common law courts. Furthermore, in the application of fair use, the secondary user’s motives are generally

Industrial Development and Western Expansion’s Effect on US Farmers Essay Example for Free

Industrial Development and Western Expansion’s Effect on US Farmers Essay True, the United States of America’s surge in industrial development and western expansion were indeed crucial factors that led to protests by farmers. This is evidenced by many different events that occurred during the time when industrialization was most in focus in the United States. This onset of industrial boom occurred some time between the 18th century and the 20th century. The fist thing that should be tackled here in order for one to understand the truth behind the initial statement of this essay is the Western United States. This refers to the westward expansion of the United States. Because of the demand for more land, the rich prairie lands of the west proved to be a lucrative source for larger areas of development. Many chose to pursue a life in the west and resided there. America’s expansion towards its west allowed more than 400 million acres of free land to be utilized for whatever purposes could be thought of by its new owners. This had numerous implications for the American citizen, most especially to the American farmer. Land became available in bulk over night. However, despite this availability, farmers and farm labor decreased by at least 30% during this stage. This decrease in production may have been due to the increase in individuals who could provide satisfaction to the market’s demand for agricultural products. Thus greater production also led to lower costs for the said products on the agricultural market. Farmers found themselves unable to compete with this change. The industrial development which had already begun at that time also contributed to this. Farmers found themselves unable to deal with industrialization. The industrialization of the agricultural industry meant new innovations, new machines. Some of these innovations included railroads which allowed the harvested agricultural products to reach the market more quickly. Other innovations such as the refrigerator allowed for preservation of the produce. Farm yields now reached more distant places but could also now be processed in factories to last longer. This meant that the farmers were up against a major competitor in the food industry, markets and globalization. Local family farms found themselves unable to keep up with the tide of new instruments. Although machines were available for them to work more efficiently such as the reaper, the steal plow, and the harvester, these were not enough for the greater capabilities of factories and national manufacturers. The marginalization of the individual farmer in the face of westward expansion and industrial development brought much distress and discontent. Protests were held and many voiced their frustration at the economical change that seemed to have happened over night. Farmer organizations such as The Grange and Farmers Alliance were established. These worked to demand regulations, protective tariffs, trade policies, conservative monetary policies and the like. It is clear from the evidence given that westward expansion and industrial development truly were factors in the protests of farmers. Whether these two issues proved to have good results in the long run is a different matter. It is sufficient to say that these caused much discontent in farmers at the time enough so that they rose in protest. References Cowan, Ruth Schwartz (1997) A Social History of American Technology, New York: Oxford University Press Hindle, B. Lubar, S. (1986) Engines of change: the American industrial revolution, Washington: Smithsonian Institution Press Meyer, D. (1989). Midwestern industrialization and the american manufacturing belt in the ineteenth century. The Journal of Economic History, 49(4), 921-937 Shannon, F. (1950). The status of the midwestern farmer in 1900. The Mississippi Valley Historical Review, 37(3), 491-510

Speed Acceleration And Velocity

Speed Acceleration And Velocity In this chapter we will look at the concepts of speed, acceleration, and velocity. As we all know gravity is a large factor in the acceleration of an object. For the purposes of this chapter we will differentiate between linear and vertical acceleration as being objects that move linearly or horizontally i.e. linear acceleration, versus objects that fall, fly, or are thrown etc. i.e. vertical acceleration. Vertical acceleration is much more governed by the force of gravity and is covered in greater detail in chapter 12 Newtons Laws. A short section at the end of the chapter addressing vertical acceleration is however included to put the area into context. You may have heard the old adage Speed kills. And you know whether you are driving your car or playing sport its a dangerous variable. Fast athletes are very difficult to handle, as are fast cars. However, having speed is of vital importance in sports. In this chapter well look at speed, velocity and acceleration and the factors that influence them. Speed, acceleration and velocity are all different. If you have ever watched a 100 meter race, you will notice that some athletes start faster than others, so their acceleration is different. Athletes finish the race at different times so their speed is different and athletes reach top speed at different stages so their velocity is different. The key terms to be covered in this chapter are speed, acceleration, velocity, distance, displacement, vertical and horizontal acceleration and velocity. The variables of speed, acceleration, displacement, etc. are about linear kinematics. Kinematics is a general term related to describing motion. Kinematics is also a branch of mechanics (specifically dynamics) that evaluates moving objects. In order to accurately describe kinematics there are certain terms that we must fully understand. They include the terms mentioned above (speed, acceleration, and displacement) and distance, velocity and position. Accurate understanding of these terms will allow us to accurately describe the movement of any object. There is often a lot of confusion about the terms acceleration, speed, and velocity. We often use the term speed in everyday language to imply all three terms and the word fast is an even more general term. Consider the following: A person can be moving fast and not be accelerating. A person can accelerate fast and not have a high velocity or high speed. A nice sporting example was the great Boston Celtics player Larry Bird. Larry Bird was very quick to accelerate over three or four steps, was not very fast at his top speed. So while Larry was very quick and dangerous over 3-4 steps, he would not make a good sprinter because his top end speed was not high. So if an object is accelerating, it is changing its velocity. Acceleration has to do with the change in how fast an object is moving. Therefore, if an object is not changing its velocity, it is not accelerating. We know that distance and displacement have different meanings. The same is true for speed and velocity. Speed can be considered as the rate at which an object covers a certain distance. Objects that move slowly cover distances in long periods of time, i.e., low speed. An object moving quickly covers distance in shorter amounts of time, i.e., high speed. If an object is not moving at all it has zero speed, zero velocity and zero acceleration. Let us consider some of these simple terms in more detail. Position: Position is simply the location of an object in space. You could consider it using coordinates on a map for example, or on a field, or gymnasium. Displacement: Displacement is simply the straight line distance an object has travelled. Distance: Distance is how far an object has travelled in any direction. It is also viewed as the total amount of displacement (regardless of ending position). Look at this simple example. Lets say a basketball court from baseline to baseline is 25m. If a player runs baseline to baseline and back what is his displacement and distance? Distance. This is the easy one since he ran up and down the court so that is 25m + 25m = 50m. Displacement. Since the player ran down the court and back again he ended up in the same place he started. So even though he covered a distance of 50m his displacement is actually zero, since he is back where he started. Lets say the player now runs up and down the court twice. His distance covered would be 25m + 25m + 25m +25m = 100m. Since he ended up back where he started his displacement is still zero. Finally, lets say the player runs from one baseline to the other and stops. In this case both his displacement and distance are the same at 25m. For the most part we use distance rather than displacement to describe movements as it is difficult to correctly measure displacement as we make a lot of turns when we travel. You say displacement is really like the old saying as the crow flies which means straight line. For example, the distance you travel in a car from New York City to Boston might be 250 miles (but your displacement is only 175 miles). When you drive in a car you get on the highway and follow the roads around the coast, over bridges, around hills, around towns etc. However, when you fly the plane flies right over everything in a straight line and you end up only travelling 175 miles (your displacement). Speed Speed is a very general term. Speed is a scalar quantity and is described as Distance divided by time (D/T, where D=distance and T=time). Scalar implies that speed has magnitude but not necessarily any direction, for example temperature or volume. People often use speed and velocity interchangeably but they are different. Speed relates to the distance an object has traveled, while velocity refers to the displacement that has taken place. So, the speed of an object tells us how far an object has traveled in a given amount of time but doesnt tell us anything about the direction in which it traveled. It all sounds a little heavy on the definitions but these are important. Therefore: Average speed = Distance traveled (m) Time (s) Now there are also different types of speed. We refer to them as average speed versus instantaneous speed. When an object is moving it often changes its speed (or direction) during its motion. When there is a change in speed we can alter our definitions. Instantaneous speed is the speed at any given instant, while average speed is the average of all the instantaneous speeds. For example, lets say a runner runs 400m in 60 seconds and crosses the line at 18 kmh or 5 m/s. This means his average speed over the 400m was 6.66 m/s even though he crossed the line at 5 m/s which is his instantaneous speed at the finish line. In other words, he was slowing down as he was getting to the end. If you have ever ran a 400m race then you will now how tired you are at the end and are definitely slowing down. How did we do these calculations? Average speed = Distance/time 400m/60 seconds 6.66 m/s The instantaneous speed recording of 5 m/s would have been measured with a radar or timing device. You could also look at various split times for different portions of the race. Many coaches do in fact do this, so a 400m coach might look at each 100m split and look at both the acceleration and deceleration patterns and average speeds during each of the four separate 100 meters. Here is another problem for you to try. Can you calculate the average speed of a swimmer that completes the 200m butterfly in 2.15 seconds? Answer: 2.15 seconds = 135 seconds. So 200m/135 seconds = 1.48 m/s A 400m freestyler swims the race in 4.10 seconds. The 200m split was 2.02 seconds. Can you calculate the following? a. What was the swimmers average speed for the race? b. What was the difference in speed for the first 200m versus the second 200m? Answer: a. 400m/250 seconds = 1.6 m/s b. First 200m split = 1.64 m/s Second 200m split 1.56 m/s As you can see, the swimmer slowed down over the second 200m. Velocity Velocity is somewhat similar to speed but velocity involves both direction and speed. So, whereas speed is a scalar quantity, velocity is a vector quantity, that is, it has both magnitude and direction. Velocity also uses displacement as opposed to distance. Remember displacement is measured as the straight line distance an object travels from starting to ending position. Velocity is direction sensitive since it is dependent upon displacement. Therefore, when you calculate velocity, you must also keep track of direction. Therefore, if you say an airplane has a velocity of 600 kmh, you would actually be a little vague. You should really say the airplane has a velocity of 600 kmh North. So, speed doesnt worry about direction, velocity does. Velocity is a positive number as we dont have negative velocity. So to summarize, a airplane traveling at 600 kmh as a speed of 600 kmh. The same airplane has a velocity of 600 kmh, North. Finally, the same airplane probably had little acceleration in the middle of its trip as it would only need positive acceleration and negative acceleration during take off and landing. Here is an interesting and challenging little problem for you to solve. Can you fill in the following table with acceleration, speed, and velocity data? We know the following, the direction of travel is south and acceleration doubles every second. If youre feeling confident you can also try and calculate the total distance that was covered over the 6 seconds. Hint! You can use the velocity for each second to help you. Average velocity = Displacement Time Let try some additional calculation examples: For example, if an athlete runs around a 400 meter track in 50 seconds we can calculate numerous factors. What was the distance traveled? What was the displacement? What was the average speed? What was the average velocity? 1. What was the distance traveled? Answer: Easy enough = 400 meters 2. What was the displacement? Answer: Since the athlete ended up in the same place as they started, displacement is equal to zero. 3. What was the average speed? Answer: Speed = Distance/Time = 400 m/60 seconds = 6.66 m/sec 4. What was the average velocity? Answer: Velocity = Displacement/Time = 0/60 seconds. In this case we end up with a value of zero and in this scenario average speed is a better indicator of overall performance. In many situations we actually calculate average velocity as speed because we cant gather the correct information to calculate speed. For example, if a punt returner catches the ball on the 20 yard line and then avoids a few tackles to ultimately score a touchdown twelve seconds later, we assume the punt returner ran 80 yards. In fact, they may have run 100 yards with all the turning and weaving but we cant accurately calculate the true distance traveled and instead use displacement. For our purposes in sports, thats okay. You try the following problem. Review Problems Can you accurately calculate average speed, velocity, distance and displacement for each of the following situations? Hint: You may not be able to calculate them all accurately. Problem: 1. A punt returner catches the ball on his own 40 yard line and scores a touchdown nine seconds later. 2. A 100 meter sprinter runs the 100 meter in 10.0 seconds flat. Acceleration The law of acceleration is Newtons second law and basically states The change of motion of an object is proportional to the force impressed and occurs in the direction in which the force is impressed. So far we have talked about speed and velocity and performed some calculations. However, while speed and velocity are valuable components, they tend to provide us with summary information and very little about specific detail. For example, if we consider the data for a 200 meter race run in 20 seconds we know that average speed was 10 m/sec. However, we would not know any information about who accelerated the fastest or who was leading after 100 meters. This information is also important as it helps with identifying strength and weaknesses in athletes and in developing training programs for particular athletes. The measurement of acceleration is important. Acceleration is the rate of change in velocity. Therefore, when acceleration is zero, velocity is constant. So when an object changes speed either by slowing up or down, or changes direction, it is accelerating (or decelerating). We can calculate acceleration by measuring the difference in velocity over the time it took for that ch ange in velocity to occur. Consider this: If you were to watch a 100M race the person leading at the 50M mark doesnt always win the race. The reason for this is that runners have different acceleration and deceleration rates, in other words their speed changes. Athletes vary dramatically in their acceleration. Some athletes are very fast over 40M but not over 100M and vice versa. So: Acceleration (a) = Velocity2 Velocity1 Where V2 is velocity at T2 Tim Where V1 is velocity at T1 Sometimes you will see this presented as the change in velocity (Delta sign à ¢Ã‹â€ Ã¢â‚¬  ) or the change in time (à ¢Ã‹â€ Ã¢â‚¬  T) A = à ¢Ã‹â€ Ã¢â‚¬  V à ¢Ã‹â€ Ã¢â‚¬  T Look at the following acceleration example. Question: A sprinter leaves the starting block at 2.5 m/s. One second later they are traveling at 5.5 m/s. What is the acceleration rate? Answer: V2 V1 = 5.5 m/s 2.5 m/s = 3 m/s squared T 1 You will note that we end up with meters per second squared as our answer would really be presented as 3 m/s/s. Heres another problem to try. Question: A punt returner catches the ball standing still and begins to return. Two seconds later his velocity was 5 m/s. What was his average acceleration over the first two seconds? Answer: V2 V1 = 5 m/s 0 m/s = 3.5 m/s squared T 2 So far we have looked at relatively straightforward examples of speed, acceleration and velocity in that they have all been examples of horizontal movement. Now let us discuss the vertical components of projectile acceleration, speed and velocity. Factors Affecting Acceleration Linear acceleration is affected by many factors and you will recall from chapter ? that the mass of an object is a very important one. Heavier objects accelerate more slowly with a given force. This has to do with both inertia and mass. Heavier objects are harder to both accelerate and decelerate. Think about how easy it is to throw a basketball versus a medicine ball. There are some other points to consider when looking at acceleration, speed, and velocity. First, we now know the units for velocity are meters per second (m/s) and meters per second squared for acceleration (m/s/s). For speed they are also m/s. Since acceleration (like velocity) is a vector quantity, it also has direction associated with it. The direction of acceleration depends on two factors: a. Whether the object is speeding up or slowing down b. Whether the object is moving in a negative (upwards) or positive (downward) direction We can simplify this by saying that if an object is slowing down then its acceleration is in opposite direction of its motion. If it is speeding up then its acceleration is in the same direction as its motion. Therefore: Acceleration (m/s2) = mass (kg)/force (newtons) Vertical speed, acceleration and velocity If you were to throw a ball up in the air and then catch it again at the same height as you released it, how would the ending velocity be? Would it be greater, less, or the same as the release speed? If you guessed the same you would be correct. You see, all objects, whether traveling vertically or horizontally, are subjected to the constant force of gravity (9.81 m/s2). This means that as soon as the ball left your hands it started to negatively (de)accelerate at 9.81 m/s2 until it had no more velocity. Then, it started to positively re-accelerate over the same distance (and time) at a rate of 9.81 m/s2 until you caught it again. This is a very neat relationship as it allows us to make many calculations based on this constant acceleration force. Projectiles are subjected to both vertical and horizontal components in their motion. The horizontal components are affected by the mass of the object and the acceleration force as previously mentioned. The vertical components are also affected by these two factors plus gravity. Consider this statement: A ball shot horizontally (at zero degrees) has the same vertical component as a ball that is simply dropped with no horizontal velocity. What this means is that if you were to throw a pass from your chest and it hit the ground 15 meters away 1.5 seconds later, and at the same time drop a second ball straight down from the same height, they would both hit the ground at the exact same time. What this is showing us is that the force of gravity component is acting consistently regardless of whether the ball has a horizontal component or not. In other words adding a horizon tal acceleration component does not affect in any way the force of gravity. Remember also that gravitational acceleration is a vector quantity comprising both magnitude and direction and acceleration is a squared variable to the magnitude of the force of gravity. This means that for every second an object is in free fall it will accelerate by ad additional 9.81m/s2. Thus the total distance travelled is directly proportional to the square of the time. Or we could say that if an object travels twice the time it will travel four times the distance. If an object travels for three seconds it will cover nine times the distance, for four seconds it is sixteen times the distance travelled in the first second. Look at the following. A coin is dropped from a cliff. The table shows how fast it is travelling at different time points. Question: A boy drops a ball from a balcony and records a time of 3 seconds for the ball to hit the ground. At what velocity did the ball hit the ground? Answer: 29.43 m/s How do we get this answer? Well, remember that gravity acts as a constant 9.81 m/s2. What this means is that for each second the ball is in flight it accelerates an additional 9.81 m/s. So: Insert schematic to demonstrate after 1 second = 9.81 m/s after 2 seconds = 9.81 m/s + 9.81 m/s = 19.62 m/s after 3 seconds + 19.62 m/s + 9.81 m/s = 29.43 m/s This is a simple illustration of the concept. Next question, what velocity would the ball have to be released at ground height for the boy to catch it on the balcony? Answer: A minimum of 29.43 m/s. The answer is the same because gravity and acceleration (or deceleration) is working to the same effect when the ball is moving upwards. This is sometimes referred to a negative acceleration. Question. A boy is standing on a balcony and is curious about how high the balcony is from the ground. The boy drops a ball and records the time it takes to hit the ground. It took 3.2 seconds for the ball to hit the ground. The boy concludes that the balcony is 66.7m high. How did he work it out? Well at the end of the first second the ball was travelling 9.81m/s, at the end of the second the ball was travelling 19.62m/s, at the end of the third second the ball was travelling 29.43m/s. If you add these three distances together you get 58.86 meters travelled after three seconds. If the ball travelled another full second it would travel another 39.24m, but it only travelled in this zone for 0.2 sec. So, 39.24m x 0.2sec =7.84m. Now we add the 58.86m + 7.84m = 66.7m, and thats our answer. There are some other factors to consider with vertical projectiles. The pattern of change in vertical velocity is symmetrical about the apex of the trajectory. So not only does the object land at the same speed it was released, it also follows the reverse flight path on the way down. Using these constant parameters we can now extend our calculations into more complex situations. For example, lets say you are watching a volleyball game in a high school gym with a 10 meter high ceiling. An opponent spikes the ball over the net and a player digs the ball at ground level at which time the ball has a velocity of 15 m/s. The question is will the ball hit the ceiling? To solve for this we can use an equation that combines several variables we talked about already. Where: V2 = velocity at time 2 V1 = velocity at time 1 a = acceleration t = time In order to answer this question we need to look at what we know and what we want to know. Well, we want to know the distance (d) the ball travels. We already know a = 9.81 m/s2 and we know V1 = 15 m/s. We also know that at the apex the velocity is zero, so V2 can be set to zero. So now our formula looks like this: 1. 0 = V1 squared + 2ad 2. 0 = (15 m/s) squared + 2 (-9.81 m/s squared) x d Now if we rearrange to solve for d our formula looks like: = (19.62 m/s squared) x d = 225 m/s squared = d = 11.47 m The answer is yes! The ball will hit the ceiling as it will travel 11.47 m. Heres another similar problem: A ball is deflected vertically at 18 m/s and the ceiling height is 11 meters. Will the ball hit the ceiling? Factors affecting projectile motion We have discussed several factors that affect the movement (or acceleration) of an object. The factors that affect vertical acceleration are the mass of the object, the force (speed) of release and gravity. Horizontal acceleration is affected only by mass and force of release (application). Gravity is of course a factor but not in determining its horizontal component. But sometimes we want to throw objects e.g. discus, hammer, etc. and while these projectiles are influenced by force and mass, there are other factors that influence how far the projectile will travel. We generally recognize three other factors that influence how far a projectile will travel when a constant force is applied. They are: 1. Angle at which projectile is released. 2. The speed of release. 3. The height of release. The optimum angle of release to increase horizontal displacement is 45 °. Projectiles released at over or below this angle will not reach their greatest distance. Look at Table 1 to see how distance traveled varies with changing angles of release. You will see from table 1 that the optimum angle of release is 45 ° and after that the decrease in distance traveled is symmetrical as height compromises distance (I.e. follows the same pattern as increasing angle of release up to 45 °). The greater the speed of release the greater the distance a projectile will travel. This holds true simply because there is a greater acceleration force applied in the first place. Simply put, if you want to throw a ball further you need also to throw it harder. The greater the height of release the greater the distance a projectile will travel. If you consider field sports in athletics you will notice that most successful hammer, discus and javelin throwers are taller, giving the mecha nical advantage over shorter competitors in that event. If you were to throw a ball from the top of a building it would strike the ground much further away than it would if you were to throw it from standing on the ground. If you have watched a discuss competition or a hammer throw you might notice that these athletes are quite tall (often over 1.9m). The reason for this is that these athletes have an advantage over their shorter counterparts as their angle of release is already several centimeters higher. Summary This chapter has provided a basic introduction to the concepts of speed, acceleration and velocity. We have also looked at how differentiating between these variables is important and sometimes difficult. Using some known constants, such as the accelerating force of gravity (9.81 m/s2) allows us to calculate and even predict the speeds, velocities and flight paths of selected projectiles. We have also discussed other factors that affect projectile motion such as height and speed of release. While this information is very important, it is a basic introduction as there are many other more complex factors affecting speed, acceleration and velocity. We did not talk about shape or design or, indeed materials which also play a role in the way particular objects react to forces. The factors are extremely important but for now are beyond the scope of this text. Following this section are additional problems for you to solve and practice. Review Problems Can you provide a one sentence definition for each of the follow terms? Distance Displacement Acceleration Velocity Speed Position Scalar Vector A ball rolls with an acceleration of -.5 m/s 2. If it stops after 7 seconds, what was its initial speed? A wheelchair marathoner has a speed of 5m/s after rolling down a small hill in 1.5sec. If the wheelchair underwent a constant acceleration of 3 m/s 2 during the descent, what was the marathoners speed at the top of the hill? A runner completes 6.5 laps of a 400m track in 12 mins (720 secs). He starts half way around the bend. Can you calculate the following? a. Distance covered: b. Displacement after 12 minutes: c. Runners average speed: d. Runners average pace: min/mile = A soccer ball is rolling across a field. At T = 0, the ball has an instantaneous velocity of 4 m/s. If acceleration occurs at a constant -0.3 m/s2 how long will it take to stop? A batter strikes a ground ball with an instantaneous velocity of 18m/s. If acceleration occurs at -0.7m/s2 how long will it take to stop?

The Signalman, An Arrest and Napoleon and The Spectre. In this essay

The Signalman, An Arrest and Napoleon and The Spectre. In this essay I am going to compare and contrast them. All three of these stories use gothic techniques; however they have a variety Compare and Contrast Three 19th Century Short Stories The first gothic novel was written in 1764 by Horace Walpole. The novel was called ‘The Castle of Ortranto’. He created the criteria that all gothic writers use today. Gothic literature uses an atmosphere of mystery, shock and suspense to intrigue the reader or audience. The gothic vocabulary consists of words that create an atmosphere of; mystery, hate, tension, fear, sorrow and terror. Gothic novels usually are set in a house or place with a large amount of gothic architecture. Gothic literature has a common involvement with the supernatural. In most gothic stories there is a spectre, ghost or vision that is out of the ordinary. Gothic stories also often contain a mysterious ending. During the gothic phase many authors took to writing in this style. Authors such as Charlotte Bronte, Charles Dickens, Arthur Conan Doyle and Edgar Allen Poe all adopted the gothic style and wrote their own stories. Gothic architecture is also included many times to provoke an atmosphere of terror. The gothic style buildings had large arches and gargoyles that looked down from the ceiling, these things gave the image of darkness. The three stories that I have read are; The Signalman, An Arrest and Napoleon and The Spectre. In this essay I am going to compare and contrast them. All three of these stories use gothic techniques; however they have a variety of differences as well as similarities. ‘Napoleon and The Spectre,’ written by Bronte and ‘The Signalman’ written by Dic... ... his wife which acts as a deterrent to them developing their matrimonial relationship. The background information about the ‘ancestral halls’ at which they are staying gives the reader the sense that there is something strange about the house. The woman feels inexplicable draughts and John dismisses it and shuts, ‘the window.’ This implies a ghostliness and again call upon the theme of the supernatural. This contrasts with ‘the signalman’ and ‘napoleon and the spectre’ because the ghosts in those two stories are physically described, whereas here it is only suggested. As days go on the woman becomes obsessed with ‘the yellow wallpaper’ in the corner of her room. The wallpaper was; ‘repellent, almost revolting: a smouldering†¦Ã¢â‚¬ ¦sulphur tint in others.’ The wallpaper seems to have a power of its own drawing the woman into an unhealthy hobby of following it.

Jane Eyre, Hamlet And Keats :: essays research papers fc

  Ã‚  Ã‚  Ã‚  Ã‚   To convey a sense of argument, imagery and perspective, authors use various types of language, syntax and vocabulary to achieve this. An extract from Jane Eyre, by Charlotte Bronte, a soliloquy from Hamlet, by William Shakespeare and Ode to Autumn, by John Keats all have a number of striking similarities between them, as well as a few differences, which will be analysed to show.   Ã‚  Ã‚  Ã‚  Ã‚  Unlike Hamlet and Autumn, the extract from Jane Eyre, doesn’t have any particular argument, but the use of language is similar to that of Keats and to some extent Hamlet. Jane Eyre is a character existing in a narrative in the first person, as is Hamlet in his soliloquy. This brings a sense of identification and realism to the reader, â€Å"I did not feel the cold, though it froze keenly† (Bronte, p143) indicated the narrator’s feelings and experience. The narration is written in the past tense, â€Å"in those days I was young† (p143) to add to the affect of a recollection and to bring the sense of an autobiography.   Ã‚  Ã‚  Ã‚  Ã‚  Jane is not an omniscient narrator, like Hamlet, therefore the reader can see things she does not, such as the gloomy significance of the extract and how it is an indication of her future relationship with Mr Rochester, and Thornfield. The whole of the novel is written in elaborate, complex sentences, which perhaps is the author’s way of demonstrating Jane’s intelligence and eloquence. The style of language and it usage is similar to that of Keats. Bronte uses active verbs such as â€Å"rising moon† and â€Å"blended clouds† (p143) and â€Å"noise† breaking out, and integrates them into the elegant prose to bring a sense of movement to Jane’s surroundings. An idea of sound is also achieved by the use of onomatopoeic words such as â€Å"tinkle of the nearest stream† and â€Å"whispering† (p143) this brings a sensuous aspect to the prose, something that Keats also manages to achieve in his Ode to Autumn. There is even a small degree of alliteration â€Å"wave wanderings† (p143) something, which Keats also uses.   Ã‚  Ã‚  Ã‚  Ã‚  The imagery in Jane Eyre is plentiful, for instance the moon is personified as female, â€Å"The rising moon . . . she looked over Hay† (p143) the images are conjured up through pictorial descriptions used by Jane, as with Keats. We get the impression that Thornfield is slightly intimidating, we know the hall is â€Å"grey and battlemented† (p143) and that the woods are â€Å"dark†.

Importance of Distance Education in India

Importance of Distance Education in India Asif Ahmed After independence, India had made tremendous progress in the field of education, though mostly quantitative in nature. Earlier, education was available only to the elites in society, and a large majority of poor and marginalized people remained illiterate. Political considerations have an important role in the expansion of higher education, especially at the state level. The state government experienced tremendous pressure from the public to establish more and more colleges and universities.In a democratic society, even the strong governments find it very difficult to resist such pressures and are compelled to succumb to the same. These considerations have led to fast expansion of higher education in our country, which in turn, have adverse impact upon its quality. Therefore, in order to insure access and education of a reasonably good quality,  Ã‚  Ã‚  Ã‚  Ã‚   we must think of some alternative system capable of supplementing t he role of conventional system, and distance education is one of such alternatives.The distance education mode was adopted by many universities to meet the ever-growing demand of those students who lacked means to pursue higher education through the regular stream. Also, there were economic constraints. Consequently, many universities in India in various regions started correspondence courses or programs by providing notes, developing a system of evaluation of response sheets. The success of these courses led to the establishment of Indira Gandhi National Open University, which is now rated as one of the best distance courses university in the world.Due to limitations of the formal system of education, policy makers were attracted towards non-conventional modes of education for providing non-residential studies like correspondence courses. The Distance Education mode, in which it is not necessary to bring all the students together to listen to the face-to-face lectures, was consider ed worthwhile. However in distance education system, the provision of occasional meetings between the teachers and the student is made. These meetings are popularly known asPersonal Contact Programmes (PCPs). The learners receive their study material through postal services for study at their home or workplace. The efforts of the students are supplemented by assignments, which are checked and evaluated by the concerned subject experts. So, Correspondence education is a piece and part of open learning. Distance education system is also known by some other common names like Correspondence Courses, Correspondence Education, Distance Education and External or Private Appearance etc.This system of education is suitable for the persons who wanted to enhance their qualifications but were not in a position to attend classes on a regular basis. Such distance courses proved a boon for the service persons as well as others desirous of pursuing higher education. As a result, a large number of i n-service persons, professionals, entrepreneurs, job-less youth, school teachers, housewives and old aged free persons made a beeline for admission to distance education study programmes.The term Distance Education received a formal recognition in 1982 when the four decades old International Council for Correspondence Education was renamed as the International Council for Distance Education. The old concept of distance education was exclusively associated with print material, while the new concept of distance education include supplementary material being used through non-print media, also such as radio, television, computers, laptops, Cd's, through projectors, video lessons and satellites. These institutions may be called the dual mode institutions.Now at present, India has two types of distance education institutions. They are  Ã‚   1. Correspondence courses institutions. 2. Open Universities. Distance education gets overwhelming response in India, the universities introduced ma ny new distance-education job oriented courses according to the changing times and students requirements. However, in this process, the actual motive of providing quality education to all took the backseat as the main focus of universities slowly shifted to making more and more money.Currently in India, the Distance Education departments are generating the maximum revenue for their universities, in many cases more than even the professional and self financing courses. The only thing to check here that the authorities of the universities running distance education courses should sharply ensure that these institutions of higher learning do not get reduced to degree distributing institutes.So universities and distance institutions higher authorities keep ensure that only quality education should be provided through distance learning programmes. In case of research based higher studies or some other professional courses being run through distance education, provisions should be made for the proper library, laboratory and required study related essential equipments and materials for the students in coordination with other related universities running similar programmes or located in the same region.It would rather be more appropriate if an inter-university body is set up by the UGC or The International Council for Distance Education of India coordinated by government educational related authorities to monitor and review the distance education programmes run by different universities and to ensure smooth progress of distance education. The correspondence courses institutions are offering more than 400 programmes in India, about 50 percent of which are professional in nature. The enrollment in these institutions is of the order of 9,00,000 in year 1999, which forms 11. 4 percent of the total enrollment in higher education in the country. An important point to be noted here is that the growth rate of enrollment in correspondence and distance education mode has been hi gher than that of higher education in general (Period,1990-2000,Source-UGC Reports). Distance Education makes it eminently possible to democratize higher education to provide access to high quality education to all, to offer need-based academic programmes, to promote and reach quality education to the learner's to their doorstep, and to set and maintain standards in higher education.Relaxed entry and exit regulation, self-appointed pace of study, flexibility in selection of courses, self-determined place of study and examination. Freedom to pursue one's study at any other place simultaneously and cost effectiveness is the reason's instrumental in making the experiment in distance education a success. The annual enrolment in Open Universities in our country has gone up from 2,00,939 to 3,50,000 in just three years, i. . , from 1995 to 1998. It is an increase of about 74 percent. Similarly the cumulative enrolment has almost doubled from 5,71,983 in 1995 to 10,50,000 in 1998. The worl d of technology is being reshaped by global trends such as convergence, increased bandwidth, enhanced multimedia capabilities, miniaturization, environmental variations, increase mobility, enhanced processing power, more powerful cognitive tools and reduced cost.These trends support transition across four generations in distance education models and associated delivery technologies: Correspondence Model (Print), Multimedia Model (Print; Audio-Video, Counselling sessions and continuous Evaluation Methods, TV / Radio Broadcast); Teleconferencing Model (One way video and Two way Audio teleconferencing, Interactive Phone-in-Radio Counselling) and Computer Aided Learning (Interactive Multimedia, Internet-Based Access better known as community Access Device to www resources) and new techniques of making of Video Lessons and provide and avail these to students in the form of Cd's.So we can say that distance education mode has become very popular and common in India, because it is catering to a wide range of aspirants (students), who are willing to upgrade their educational qualifications for various reasons. The Distance education system provides opportunities not only to younger students but also to those from the older age groups. The main reasons for increasing interest in Distance education lies in the need for continuing education in today's competitive world. Every people always try to add value to their competence in their bid to advance their carrier further.Distance Education is also very cheaper to compare with regular mode of education. Distance education has greatly reduced the wall of distance between education and a normal student beyond the long distance of home or work place to university. Now just a little need to increase the need to make it professional and employability part of education community. References Ambika Sharanjit Kaur (1996): Managing Distance Education, Deep and Deep Publications, New Delhi. A. W. Khan. â€Å"Online distance learnin g: A model for development countries†.Keynote address delivered at the international conference EDUNET-99 on Internet and Education held at Chennai on December 16-17, 1999. D. Pulla Rao, Article â€Å"Development of Correspondence Education in India: An Appraisal†. Indian Journal of Adult Education, Vol. 67,No. 3-4, July-December 2006, pp. 59-64. Inayat Khan (1989): Distance Teaching, Amar Parkashan, New Delhi. J. C. Taylor, â€Å"Flexible delivery: Globalization of lifelong learning†. Indian Journal of Adult Education, Vol. 7,(1), July-December 2006, pp. 55-67. Prithipal Singh Kapoor, Article â€Å"Distance Education Needs Revamp†.The Tribune, Chandigarh. Saumitra Mohan and K D Prasad, Article â€Å"Distance Education: Insider's Story†. Third Concept. July 2001, pp. 55-58. Sumit Dhawan, Article â€Å"Time to Review Distance Education†. The Tribune, Chandigarh, May 15, 2007 Venugopal Reddy, V and Manjulika, S(1996): Distance Education in Indi a; A Model for Developing Countries, Vikas Publishing House Pvt. Ltd. , New Delhi. Article- â€Å"Distance Education in  India†. Published in THIRD CONCEPT (An International Journal of Ideas, ISSN 09070-7247). November 2007 issue on page no 29-32.