If you hear a gun shot two second after has fired how far away from the gun are you
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https://www.meritnation.com/ask-answer/question/the-echo-of-a-sound-is-heard-2-seconds-after-the-sound-from/physics/1633451
https://www.meritnation.com/ask-answer/question/the-echo-of-a-sound-is-heard-2-seconds-after-the-sound-from/physics/1633451