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Q. |
The velocity of sound in moist air is more than in dry air because the moist air has |
A. | less density than city air |
B. | less pressure than dry air |
C. | more pressure than dry air |
D. | more density than dry air |
Answer» A. less density than city air | |
Explanation: The density of dry air is more than that of moist air (when moisture is removed from air, its density. increases). The speed of sound in a medium is inversely proportional to the square root of its density. Therefore, the speed of sound in moist air is more than that in dry air. |
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