Aball on the surface of a pool bobs up and down due to the waves formed in the pool. the water waves have a wavelength of 1.2 meters, and they pass the ball with a frequency of 3 hertz. what is the speed of the waves?

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added