A 10.0kg ball is falls from a window 7.00m above the ground. What will be the velocity of the ball as it strikes the ground?

The softest and hardest minerals are: softest hardest

The energy equivalent of the rest mass of an electron is

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?