How much net work is done on the weights
A weight lifter lifts a set of weights a vertical distance of 1.38 m. If a constant net force of 399 N is exerted on the weights, how much net work is done on the weights? Answer in units of J.
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White light consisting of wavelengths ranging from 400nm to 700nm falls on a diffraction grating that has 4000 lines/cm. What are the angular ranges of the first three orders?
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A 270 g ball and a 660 g ball are connected by a 49.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 100 rpm. What is its rotational kinetic energy?
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