LateralRiddle #1415
On a frosty morning Nina's car warned her that all four tires were low. By afternoon the warning was gone. She never added air and no one touched the tires. How?
Hint: Think about what changed overnight.
Answer
Cold air takes up less space, so tire pressure dropped overnight and came back as the day warmed up.
Tire pressure falls roughly one pound for every 10 degrees of cooling, which is why warnings pop up on cold mornings.
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