How fast are the waves moving

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Q. A shipwreck survivor is lying on a raft in the middle of the ocean. The survivor trying to pass the time counts 15 crests that pass the raft in 45 seconds. From crest to the trough of the same wave, the survivor estimates a distance of 4.0 m. How fast are the waves moving?

Q. An 8 g bullet is fired into a 2.5 kg ballistic pendulum and becomes embedded in it. If the pendulum raises a vertical distance of 6cm, compute the initial speed of the bullet.

Reference no: EM1367277

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