Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10-3 kgm-3 and the air above is at a pressure of 101.3 kPa. [Take g = 9.8 ms-2]

On a particular hot day, the temperature is 40°C and the partial pressure of water vapor in the air is 38.8 mmHg. What is the relative humidity?

A. 70
B. 62
C. 80
D. 42

Correct Option: Answer is A
Relative Humidity= partialpressureofH2O/saturatedvaporpressureofH2O×100%

S.v.p. of water at 40°c = 55.3

⇒ Relative Humidity= 38.8/55.3×100%

Relative Humidity= 70%

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