a ball of 0.900 kg slides horizontally over a frictionless surface and bumps into a heavy stone at a speed of 20.0 m / s. the ball returns with 70.0% of its initial kinetic energy. how big is the change in the impulse of the stone?

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.