Arigid tank contains 1 kg of air (ideal gas) at 15 °c and 210 kpa. a paddle wheel supplies work input to the air such that final temperature is 97 "c. the specific heats are cp 1.005 kj(kg. k) and c-0.718 kj/(kg. k). determine the total work done in kj:

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.