# physics

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Hans stands at the rim of the Grand Canyon & yodels down to the the bottom. He hears his yodel echo back from the canyon floor 5.20 seconds later. Assume that the speed of sound in air is 340 m/s. How deep is the canyon?

• physics -

d = Vt = 340 * (5.2/2) = 884m.

• physics -

d=vt
340m/s(5.2s)=1768m

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