Minimum number of unequal vectors which can give zero resultant are (a) two
(b) three
(c) four
(d) more than four

By what primary heat transfer mechanism does the sun warm the earth?

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?

I’ve been stuck on this for a while