How long is the rod
A man strikes a long aluminum rod at one end. Another man, at the other end with his ear close to the rod, hears the sound of the blow twice (once through the air and once through the rod), with a 268 ms interval between them. How long is the rod?
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Calculate the force of gravity between a newborn baby (mass = 3 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its position closest to Earth (distance = 8.0 1010 m).
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The scale of a spring balance reading from 0 to 175 has a length of 15.0 . A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.70 .Ignoring the mass of the spring, what is the mass of the fish?
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A 4.2 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 2.4 m/s2, find the force exerted by the rope on the bucket.
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