Calculate the speed of a sound wave produced from a guitar if it creates 38 compressions each second with 0.57 meter wavelength

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

Panel bc in fig. p2.76 is semi-circular, with the 3 meter radius and horizontal straight edge through point b. compute (a) the hydrostatic force of the water on the panel, (b) its center of pressure, and (c) the moment of this force about point b. assume atmospheric pressure on the dry side of the panel