With the aid of a suitable diagram, explain what is meant by an electromagnetic wave.

Heena wants to measure the volume of a ball that is 24 cm across. how should she set up her equation?

Which one of the following research methods can show cause and effect

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