Physics

Problem

At STP, the pressure of air is

1.013\times10^{5}\,\text{Pa}

and its density is

1.29\,\text{kg\,m}^{-3}

. Taking

\gamma = 1.4

, calculate the percentage by which Newton’s predicted speed of sound differs from Laplace’s value for air at

0^{\circ}\text{C}

. a)

28.6\%

15.4\%

18.3\%

9.8\%