If the water vapor content of air remains constant, lowering air temperature causes

ANSWER

An increase in relative humidity

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The correct answer is increase in relative humidity.

Explanation:

Humidity is the amount of water vapor present in the air.

The expression for the relative humidity is defined as follows:

The warmer air contains more water vapor than the colder air.  There is decrease in the relative humidity when the temperature of the air rises. There is increase in the relative humidity when the temperature of the air falls.

Therefore, the lowering in the air temperature causes increase in relative humidity If the water vapor content of air remains constant.

490 n

f=125n a=2.5m/s2