Define loudness and intensity of sound. How are the two concepts related?
What is the unit of intensity of sound?
At what decibel level do sounds start to become harmful to the ears and hearing?Relate amplitude and distance to the intensity and loudness of sound

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