Estimate the speed of sound in air at standard temperature and pressure. The mass of 1 mole of air is `29.0xx10^(-3)kg`, `lambda` for air `=7//5`.

Explanation

To estimate the speed of sound in air at standard temperature and pressure (STP), we can use the formula for the speed of sound:

\[ V = \sqrt{\frac{\lambda P}{\rho}} \]

Where:
- \( V \) is the speed of sound,
- \( \lambda \) is the ratio of specific heats (given as \( \frac{7}{5} \)),
- \( P \) is the pressure,
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