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Biology, 25.07.2019 23:00 lujaynsparkles

Do you expect an echo to return to you more quickly on a hot day or a cold day? do you expect an echo to return to you more quickly on a hot day or a cold day? cold day. hot day. same on both days.

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Do you expect an echo to return to you more quickly on a hot day or a cold day? do you expect an ec...
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