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Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90