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Question

When temperature is increased by 1oC, velocity of sound in air increases by

A
0.61ms1
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B
6.1ms1
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C
61ms1
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D
610ms1
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Solution

The correct option is B 0.61ms1
Velocity of sound in air vT
vv=TT
Let the initial temperature T=273 K
Speed of sound in air at 273 K v=330 m/s
New temperature T=273+1=274 K
v330=274273
v=330.61 m/s
Thus increase in sound Δv=vv=330.61330=0.61 m/s

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