A boy hears an eco of his own voice from a distant hill
a boy hears an eco of his own voice from a distant hill after 1s. The speed of the sound is 340m/s. What is the distance of the hill from the boy?
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on march 1 2014 eric keene and abigail mckee form a partnership keene agrees to invest 21100 in cash and merchandise
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a boy hears an eco of his own voice from a distant hill after 1s the speed of the sound is 340ms what is the distance
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