Work is done when force is applied a for a long enough period of time.
b in the opposite direction that the object moves.
c in the same direction that the object moves.
d two of the above

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

The heliocentric and the geocentric models of the solar system included these central principles

To a of 4 x hz is 1. 0. mm nm nm