# physics

A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 3.87 s after the stone is dropped. How deep is the hole?

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1. d = 343m/s * 3.87s = 1327.4m.

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posted by Henry
2. Wrong. Not all of the 3.87 seconds is sound travel time. Most of it isnt

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posted by drwls

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