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October 1, 2014

Homework Help: high school physics

Posted by eugenia on Friday, March 19, 2010 at 6:22pm.

3seconds after a gun is fired, the person who fired the gun hears an echo. How far away was the surface that reflected the sound of the shot? (book answer is 510m)

speed of sound 340m/s
time = 3seconds

dont know what to do

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