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Carol drops a stone into a mine shaft 122.6 m deep. How soon after she drops the stone does she hear it hit the bottom of the shaft?

  • physics -

    You have to figure the time of fall.

    122.6=gt^2 solve for t, the time of fall.

    then figure the time to get the sound up:
    122.6=vsound*tup solve for time up

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