Bicyclists often carry along a water bottle on hot days. When the bottle is wrapped in a wet sock, the water temperature stays near 24 °C for three or four hours, even when the air temperature is near 38 °C. Why does the water stay cool?

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Bicyclists often carry along a water bottle on hot days. When the bottle is
wrapped in a wet sock, the water temperature stays near 24 °C for three or
four hours, even when the air temperature is near 38 °c. Why does the
water stay cool?
Transcribed Image Text:Bicyclists often carry along a water bottle on hot days. When the bottle is wrapped in a wet sock, the water temperature stays near 24 °C for three or four hours, even when the air temperature is near 38 °c. Why does the water stay cool?
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