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March 26, 2017

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A sound wave, traveling at 348m/s, is emitted
by the foghorn of a tugboat. An echo is heard
1.99 s later.
How far away is the reflecting object?
Answer in units of m

  • physics - ,

    Call it 2 seconds for the round trip

    the reflector is half the round trip away, so the sound takes 1 second to get there, and one second to get back (assuming the tugboat is going slowly relative to the speed of sound)

    so, how far does the sound go in 1 second?

  • physics - ,

    A sound wave, traveling at 337m/s, is emitted
    by the foghorn of a tugboat. An echo is heard
    1.4 s later.
    How far away is the reflecting object?

  • physics - ,

    471.8 m

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