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A soap film (n = 1.33) is formed in a loop of wire that is mounted vertically is not exactly uniform in thickness because of its weight, but wedge-shaped in cross section. When the film is illuminated...

The horizontal boom supporting the sign is of uniform construction and weighs 50 N. If the sign weighs 150 N, the angle between the force exerted by the hinge on the boom and the boom is   approx...

How much work does a supermarket checkout attendant do on a can of soup he pushes 0.650 m horizontally with a force of 4.90 N? Express your answer in joules and kilocalories.

In a downhill ski race, surprisingly, little advantage is gained by getting a running start. (This is because the initial kinetic energy is small compared with the gain in gravitational potential...

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