Consider a mass on a spring. If you want to double the systemâs energy, by what factor must you increase the amplitude of vibration? what will happen to the speed of the object?.

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.

How do you tell if someone actually cares about you? and just say they do?

The ability to make things happen is also called a. heat b. force c. matter d. energy