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A rider of mass 40 kg sits on a sled of mass 10 kg at the top of a hill that is 15 m above level ground. The sled is given a push, providing 1600 J of kinetic energy to the sled and the rider. What is the kinetic energy of the sled and rider at the bottom of the hill?
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At the low point in its swing, a pendulum bob with a mass of 0.2 kg has a velocity of 5m/s. How high will the bob swing above this low point?
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A 0.2 kg ball is twirled at the end of a string in a horizontal circle with a radius of 0.6 m. The ball travels with a constant speed of 4.0m/s. What are the values of the horizontal and vertical components of the tension in the string?
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what is the best book to read to understand statistical mechanics?
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3.1​A tungsten filament is 35 mm long and has a radius of 7.5 mm. Calculate the current emitted from this filament at temperatures of 2400 °C and 2500 ºC.
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can a compound semi-conductor be considered as extrinsic semi-conductor due to its compound form?
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If light travels in a straight line, why a rainbow appears curved?
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A hollow cylinder of radius 10 cm rotates about its axis which is vertical. A small body remains in contact with the inner wall if the frequency of rotation is 200 per minute but falls at lower frequencies. Find the com-efficient of friction between the body and the cylinder.
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how the energy is produced in a nuclear reactors?
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A hiker sets out on a trek heading [N35degreesE] at a pace of 5.0km/h for 48.0 min. He then heads west at 4.5km/h for 40.0 min. Finally, he heads [N30degreesW] for 6.0km/h, until he reaches the camground 1.5 hours later. What is his total displacement?
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