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Question

The atmospheric pressure decreases at the rate of ______________.

A
1 millibar/altitude of 10 meters
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B
1 millibar/altitude of 15 meters
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C
1 millibar/altitude of 18 meters
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D
1 millibar/altitude of 20 meters
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Solution

The correct option is A 1 millibar/altitude of 10 meters
Near Earth's surface the pressure decreases with height at a rate of about 1 millibars for every 10 metres. However, over cold air the decrease in pressure can be much steeper because its density is greater than warmer air.

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