How many different plant and animal species can be found in tropical rainforests PLEASE ANSWER BY TODAY!
A, A couple hundred
B, 100 thousand.
C, 10 thousand.
D, Millions.

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?