Energy 1. A man climbs on to a wall that is 5 m high and gains 2200 J of potential energy. What is the mass of the man? Given: Formula: h = 5 m m = PE/gh PE = 2200 J Solution: m = 2200 J / (9.8 m/s2 x 5 m) m = 49 kg 2. Calculate the kinetic energy of a 500 kg car travelling at 50 m/s. Given: Formula: m = 500 kg KE = mv2/2 v = 50 m/s Solution: KE = 500 kg x (50 m/s)2 / 2 KE = 625 000 J Power 3. Riley climbs a flight of stairs in 3 minutes. If he
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We’ve Got Lots of Free EssaysLoginSign Up SUBJECTS SEARCH SUBMIT AN ESSAY HELP Words of Wisdom: "just because someone has more guy friends than girl friends‚ doesn’t make them a mut - m + sl." - Ytiema Home Page » English » English: Creative Writing Essays for English: Creative Writing Creative Writing: a Night Fishing Creative Writing: A Night Fishing It must have been 4 feet long and must have weighed at least 30 lbs. It was one of the slimiest ones we ever caught. The tentacles were
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ROME 1. Macedonian professional army-advantages included a wide range of specialists‚ strict discipline and elimination of large numbers of noncombatant servants 2. Battle of Chaeronea- ended Greek city state freedom once and for all. 3. Philip of Macedon-by his death he had installed his despotic rule throughout Greece 4. Alexander-was motivated by the desire for personal power and glory 5. Despotism-absolute power- of authority of rulers who represented themselves as at least semi-divine
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The Science of Transportation: Ancient World: The Wheel: • How do they work? Wheels work by rolling along a surface. The curved surface of the wheel reduces the friction between the two surfaces due to a decrease in surface area. With less friction it is much easier to move an object. This is because rolling friction is much weaker than sliding friction. • How did they come to be? The wheel was invented in prehistoric times; as the oldest example of a wheel yet found is from the region of
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LIFE IS ACTION‚ NOT CONTEMPLATION 1. The end of man‚ said Carlyle long ago‚ is action and not thought‚ though it be ofthe noblest. Is it not logical‚ after all‚ that what man knows or thinks to be rightshould find expression in what he actually does? If we go on thinking andcontemplating about the rights and wrongs of a particular course of action and donothing practical‚ we might earn the reputation of being ivory-towerphilosophers‚ and that would be all. Total absorption with the thought processes
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the viscous force (or drag) FD‚ and the buoyancy force FB balance the gravitational force Fg (= mg) FD + FB = Fg (1) When this equilibrium is reached‚ the body continues to fall‚ but at a constant velocity‚ called the terminal velocity. (ii) Archimedes ’ Principle states that the buoyancy force acting on a body immersed in a fluid is equal to the weight of the fluid displaced. If the body immersed is a sphere of volume V and radius r‚ the volume of fluid displaced is also V. Thus if the density
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earth consisted of four pure substances or elements‚ which were earth‚ air‚ fire‚ and water. He also believed that the earth was the centre of the universe‚ and that anything beyond the earth consisted of a fifth pure substance called quintessence. Archimedes was an inventor and mathematician‚
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of Ancient Greece Devin Dimattia HIS 301 Greece Research Paper All throughout Ancient Greece‚ there were many great influential legacies. Some were philosophers‚ such as Aristotle and Plato‚ and some were mathematicians‚ like Archimedes. However‚ there was Alexander the Great‚ who became king of Macedonia and was one of the most successful military commanders in history since he sustained abundant accomplishments. He was undefeated in battle‚ and by the time of his death‚ he had
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the Wright Brothers‚ this dream is now a living marvel. Wether it is a helicopter or a plane‚ they both share the same purpose of making our life easier. Besides that‚ they both uses the same basic principle of flight which are aerofoil and the Archimedes’ principle. Although they are not entirely the same in the they apply these theories but in a way they are similar. Whether fixed or rotating the wing achieves lift due to it’s shape. The upper side is rounded causing passing air to accelerate
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Wilson‚ College Physics‚ 6th Edition Chapter 9 Exercises MC = Multiple Choice Question‚ CQ = Conceptual Question‚ and IE = Integrated Exercise. Throughout the text‚ many exercise sections will include “paired” exercises. These exercise pairs‚ identified with red numbers‚ are intended to assist you in problem solving and learning. In a pair‚ the first exercise (even numbered) is worked out in the Study Guide so that you can consult it should you need assistance in solving it. The second exercise
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