A pendulum consists of a large balanced mass hanging on the end of a long wire. At the point where a 28-kg pendulum has the greatest potential energy, the angle between the pendulumâs weight and the wire is 89°.What is the wireâs length if the magnitude of the torque exerted by the pendulumâs weight at this position is 1.84 Ă 104 Nâ˘m?
Answers: 1
Physics, 21.06.2019 23:30
A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?
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The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.
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What is the increase in density of a medium due to wave travel?
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A pendulum consists of a large balanced mass hanging on the end of a long wire. At the point where a...
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