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# HW14 - HW 14 14.1 A steel ball of mass 0.100 kg and...

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HW 14 14.1 A steel ball of mass 0.100 kg and specific heat 460 J kg K drops onto a hard floor from a height of 10m. It bounces repeatedly until it stops and on each rebound it bounces with 0.90 times its impact speed. Assume you can neglect air resistance; that negligible heat is transferred out of the ball to the air or the ground. Assume further that all the mechanical energy lost by the system on the rebound is converted into heat that is absorbed by the ball. What is the total increase in temperature of the ball when it finally comes to rest? 14.2 The two isotopes of uranium, U 235 and U 238 (the superscripts refer to their atomic mass), can be separated by a gas-diffusion process by combining them with fluorine to make the gaseous compound . UF 6 Calculate the ratio of the rms speeds of these molecules for the two isotopes, at constant T . 14.3 (a) An insulated cylinder of volume 1.0L is filled with nitrogen (which can be treated as an ideal diatomic gas) at 100kPa at 300K. A piston adiabatically compresses it to a volume of 0.05L. What is the temperature and pressure after the

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HW14 - HW 14 14.1 A steel ball of mass 0.100 kg and...

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