A cart is moving on a track in the positive x-direction. A force acting parallel to x-axis is excreted on the chart. The chart shows the net force excreted on the chart as a function of displacement. As the cart travels from x=0m to x=4m, what is the net change in kinetic energy of the cart

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.