___ is the rate of change of velocity of an object? Formula: ___

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?