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Dew Point and Humidity

The weather r...

Question

The weather report reads, "Temperature 20^0 C : Relative humidity 100 %". What is the dew point ?

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Solution

Given Temperature = $20^{0}$ C

Relative humidity = 100 %

So the air is saturated at $20^{0}$ C

Dew point is the temperature at which saturated vapour pressure is equal to present vapour pressure

So, $20^{0}$ C is the dew point.

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