If a 90°F sample of air contains half the water vapor that it could hold at that temperature, its relative humidity is:

Name: If a 90°F sample of air contains half the water vapor that it could hold at that temperature, its relative humidity is:
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Relative humidity is the ratio of the amount of water vapor present in the air to the amount it could hold at that temperature (expressed as a percentage). If the air contains half the water vapor it could hold at 90°F, then its relative humidity is 50%.

If a 90°F Sample of Air Contains Half the Water