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Susie hammers on a block of wood when she is 85 m from a large brick wall Each time she hits the block she hears an echo 0.5 s later With this info calculate the speed of sound?
Wiki User
∙ 15y ago
85m/persecond No. For Susie to hear the echo, the sound has to travel 170 meters--85m to the wall, 85m back. The return hits her half a second after she hits the wood, so the hammer stroke has to travel to the wall in .25 second. 170 meters times two is 340 meters/second.
Wiki User
∙ 15y ago
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