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March 28, 2017

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A man fires a gun 150m from a cliff. A second man who is standing 300m further away from the cliff hears the gun 1 second after he sees the flash. When will the second man will hear the echo from the cliff?

  • science - ,

    d = 2 * (150+300) = 900m = Total distance traveled by the sound.

    d = Vt,
    t = d / V = 900m / 300m/s = 3s. to hear
    echo.

  • science - ,

    d = 2* 150 + 300= 600 m

    t=d/v
    =600m/300m/s
    =2s to hear

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