An object is projected horizontally at 9.7 m/s from the top of a 142.2 meter cliff. How far from the base of the cliff will the object strike the ground?
Units:

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?

Why should the wavelength scale of spectroscope be calibrated

Two positive charges are equal. which has more electric potential energy?