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11th grade

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sound travels at 350 m/s in warm air. "If you hear the echo in 10 seconds, how far away is the reflecting surface?

  • 11th grade -

    The sound travels both ways.


  • 11th grade -

    1,750 meters, since you're hearing the echo, and the ehco is twice the distance. So, you'd take 350 * 10 / 2 or just 350 * 5.

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