Two identical speakers, one directly behind the other, are generating a 795 Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at the position of a listener standing in front of them

Anybody wanna ? (picture included? )

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance