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.
there is several ways that waves can move. waves can move by wind. the energy passes to the water causing waves. The better answer. Waves move because they are a movement o â¦ f energy through a medium. The wave entails two parts, which are the crest and trough. The wavelength is the distance between two crest.