If 25 °C (77 °F) air feels warm on our skin, why does 25 °C water feel cool whenwe swim in it? Water opens pores in human skin better than

air does, so the heat transfer area is largerwith water. O When water contacts human skin, it vaporizes at the surface, which causes the water tofeel cooler than air. The heat transfer rate from skin to water is faster than the rate from skin to air because ofdifferen ces in fluid physical properties O Water holds energy better than air does, so air feels warmer since it is transferring energyfaster.

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