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2. This diagram represents a top-down view of an experiment on a table. The 250 g and 100 g masses are
falling and are pulling the block. Draw an arrow to show which way the block will move. Do not interpret the
size of the arrow just draw the direction.

Sound is a disturbance that travels through a medium as a

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

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