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Velocity of sound in a tube containing a...

Velocity of sound in a tube containing air at `27^(@)`C and at a pressure of 76 cm of Hg is 300 m/s. What will its velocity be when the pressure is increased to 100 cm of Hg and the temperature is keptconstant ?

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The correct Answer is:
300 m/s
No effect occurs on sound speed due to pressure change at same temperature
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