Which statement best explains why the overall charge on an atom is zero?

a: the positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud.
b: the positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
c: the negative charge of the neutrons in the nucleus equals the positive charge in the electron cloud.
d: the negative charge of the protons in the nucleus equals the positive charge in the electron cloud.

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Observations show that interstellar clouds can have almost any shape and

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?