Anegatively charged rubber rod can pick up small, neutrally charged pieces of paper by a process called

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.

Select all that applywhat are some basic resources a family is expected to provide for children? educationclothesspending

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87