why is that even if it’s Super hot and sunny outside, The air will feel cool if you stick your arm out of the window while driving?

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In: 5

Answer 1

Though “hot”, the air is still cooler than your body temperature. When that air hits your body, there’s a heat transfer. Your body gets a bit warmer, and the air gets a bit colder, both moving towards something in between the two temperatures. With a large amount of that air rushing over your body, the effect gets a log stronger. This is basically what the weatherman calls wind-chill.