Susie hammers on a block of wood when she is 85 mfrom a
Chapter 10, Problem 54(choose chapter or problem)
Susie hammers on a block of wood when she is 85 mfrom a large brick wall. Each time she hits the block, shehears an echo 0.5 s later. With this information, showthat the speed of sound is 340 m/s.
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