An outside loudspeaker (considered a small source) emits sound waves with a power output of 104 w. (a) find the intensity 10.8 m from the source. w/m2 (b) find the intensity level in decibels at that distance. db (c) at what distance would you experience the sound at the threshold of pain, 120 db? m

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

What are the necessary conditions for fusion?

Energy can be transformed from one form to another. the diagram shows one such process. which energy transformation is represented in the diagram? nuclear to thermal and radiant nuclear to electrical and chemical chemical to nuclear and radiant chemical to electrical and nuclear