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Physics, 18.10.2021 09:50 Elsalvador7310
the first time you hear a sound it took 2.6seconds and takes 7.1 seconds for you to hear an echo the speed of sound is 340m. s how wide is the river
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the first time you hear a sound it took 2.6seconds and takes 7.1 seconds for you to hear an echo the...
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