A mirror faces a cliff located some distance away. Mounted
Chapter , Problem 21(choose chapter or problem)
A mirror faces a cliff located some distance away. Mounted on the cliff is a second mirror, directly opposite the fi rst mirror and facing toward it. A gun is fi red very close to the fi rst mirror. The speed of sound is 343 m/s. How many times does the fl ash of the gunshot travel the roundtrip distance between the mirrors before the echo of the gunshot is heard?
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