A railroad whistle is sounded an echo is heard 50 seconds
A railroad whistle is sounded. An echo is heard 5.0 seconds later. If the speed of sound is 343m/s, how far away is the reflecting surface?
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a buffer is made from benzoic acid and sodium benzoate how many grams of the acid would you have to mix with 144 g of
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a railroad whistle is sounded an echo is heard 50 seconds later if the speed of sound is 343ms how far away is the
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