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Naseer Chander
Asked: 2022-11-09T19:34:57+05:30 In:

The velocity of sound in air at NTP is 331 m/s. Find its velocity when temperature eises to `91^(@)C` and its pressure is doubled.
A. 372 m/s
B. 382.1 m/s
C. 423 m/s
D. 392.5 m/s

The velocity of sound in air at NTP is 331 m/s. Find its velocity when temperature eises to `91^(@)C` and its pressure is doubled.
A. 372 m/s
B. 382.1 m/s
C. 423 m/s
D. 392.5 m/s
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1 Answer

  1. Correct Answer – B
    Given velocity of sound in air `v_(o)` = 331 m/s
    `” “t=91^(@)C`
    `v_(t)=v_(o)sqrt((273+t)/(273))=331 sqrt((273+91)/(273))=331sqrt(1+91/273)`
    `v_(t)=331sqrt(1+1/3)=331xx2/sqrt3`
    `” “=382.1m//s`

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