Question

at what temperature velocity of sound in air is 1.5 times the velocity at 7°c

Answer 1

PM=ρRT this is the gas eqn in different form where M is the molecular mass of gas and theρ is density.7576=273+25×ρ273×1.29 =1.17 kg /m3γ=1.41 is the gamma for air P=75 cm of hg=hρhgg=0.75×13600×10=102000 pa ,I had convert the pressure in pascal.v=γPρ=1.41×1020001.17=350.6 m/sRegards