Bowling ball and a balloon are dropped from a 50 m tall building at the same time. IN AIR which object will hit the ground first? •Bowling ball

•Balloon

•Neither, they will both hit at the same time.

Can anybody me with this? ? (picture included.)

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?

Am i correct on these two physics questions?