At what temperature the velocities of sound in air increase by 40% to that at 270C?
Ans. :
solution
Temperature (T27)=270=27+273=300K
Velocity of the sound at 270(V27)= v
Temperature at which velocity of air is increase by 40%(T)=?
Velocity that T temperature (VT)=v + v of 40%=1.4v
Since we have relation
Or, T= VTV27T27−−−√= 1.4vv300−−−√ = 588K.