When two waves or pulses are in the same place in the same medium at the same time, how does the amplitude (height) of the medium compare to the amplitudes of
the individual pulses? In other words, what do we do with the heights of the pulses
to get the height of the medium?

Please help will do brainlest

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

What kind of simple machine is a catapult?