Question

The value of adiabatic constant `gamma` for oxygen and nitrogen is same. The speed of sound in oxygen is 470 m/s at STP. The speed of sound in nitrogen at STP is
A. 340 m/s
B. 580 m/s
C. 502 m/s
D. None of these

Answer 1

Correct Answer - C
`c=sqrt(((gammaRT)/(M)))`
`therefore (c_(2))/(c_(1))=sqrt(((M_(1))/(M_(2))))or (C_("nitrogen"))/(C_("oxygen"))=sqrt(((32)/(28)))=sqrt((8/7))`
`because" "C_("nitrogen")=sqrt((8/7))C_("oxygen")=sqrt((8/7))xx470`
`" "=502.45m//s ~~502m//s`