Mathematics, 15.02.2020 03:08 vanydparis
If you shout into a Grand Canyon your voice travels at the speed of the sound 340m/s to the bottom of the canyon and back , and you hear an echo ,how deep is the gran canyon at a spot where you can hear a echo 5.2 seconds after you shout
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If you shout into a Grand Canyon your voice travels at the speed of the sound 340m/s to the bottom o...
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