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Korvikt [17]
4 years ago
8

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why

Chemistry
1 answer:
Mashutka [201]4 years ago
6 0

As the air molecules move through the valve they have friction as they hit the walls, and its this friction that causes it to heat up.

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3 years ago
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3 0
3 years ago
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