Is light a particle or a wave scienists continure to debate this only a particle neither a particle nor a wave only a wave

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.

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

70 give a real life example showing how sensory neurons work with the motor neurons