If the crests of two waves overlap, which of the following will be true regarding the new wave formed? A. The new wave will produce a lower-pitched sound than the two original waves.

B. The new wave will produce a louder sound than the two original waves.

C. The new wave will produce a quieter sound than the two original waves.

D. The new wave will produce a higher-pitched sound than the two original waves.

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?