Whish is a drawback of solar energy? a. it is a non renewable source b. it depends on the climate c. it is difficult to use for electricity d. it can be a source of water pollution

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

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?