The primary responsibilities of human resources are: 1  C - Compensation. 2  H - Human resource development. 3  E - Employee and labor relations. 4  S - Safety and health. 5  S - Staff.
A new technique uses sound waves to levitate objects and move them in mid-air. Credit: Dimos Poulikakos View full size image. View full size image. Hold on to your wand, Harry Potter: Science has outdone even your best Leviosa! levitation spell.
Simple Version: The energy in a sound wave is mechanical, being both kinetic and potential energy associated with the air. Explained: Just as in a vibrating spring, the â¦ medium (air) has mass and moves and so moving mass is kinetic energy.irst of all, sound waves are mechanical energy. Secondly, anything that makes noise because it is moving would be an example of mechanical energy turning into sound energy; â¦ like a car going down the road, a gun shot, or somebody slapping their palm against their forehead.