Physics Help?

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1 Answer
Aug 14, 2018

0.612 s

Explanation:

We can imagine the wave has to travel to the cliff and then bounce back.

The speed of sound is about 343 m/s (depends on conditions, but that's a good estimate). The wave has to travel 210 meters, so it takes
#t = (210\ m)/(343\ m/s) = 0.612\ s #