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The sound moves in a second 340 metres. That is in 3.8 seconds 1292 metres. But because there is the way down to the ocean and back to the ears of the stone dropper, the distance must be half of it. The cliff is 646 metres high.

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Q: A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.8s later If the speed of sound is 340 ms how high is the cliff?
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