Megan rolls a ball down a ramp until the ball hits the wall. The ramp is 2.5 m long and the distance from theend of the ramp to the wall is 1.5 m. If it took 0.5 seconds for the ball to hit the wall then what is the ball’s Speed?

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.