Typically, what percentage of the air's volume near the Earth's surface is water vapour?
A. less than 4%
B. close to 10%
C. about 21%
D. about 78%
Answer: A
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How many grams of sugar (sucrose) are there in 5 liters of sugar water that has a concentration of 0.5 grams per liter of solution?
A. 50 g B. 25 g C. 1.5 g D. 2.5 g
The specific humidity of air changes when there is a change in
A) pressure of a parcel of air. B) the temperature of a parcel of air. C) the addition or removal of water vapor. D) all of these.
Which is NOT an area where Muslims are concentrated in India?
A) in cities B) in Kashmir C) in Kerala D) in the upper and central Ganges Plain E) in the Deccan Plateau
What is one disadvantage of using groundwater?
A. depletes aquifer from overpumping B. produces too much cheap electricity C. rarely clean enough to drink D. more expensive to extract than most surface waters E. cheaper to extract than most surface waters