Sound is passing perpendicularly through an open window whose dimensions are 1.1 m x 0.75 m. the sound intensity level is 79 db above the threshold of human hearing. how much sound energy comes through the window in one hour? number units

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final