A 50.0 kg block rests on a level surface.
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Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
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Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star
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Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?
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