Speed of sound in the air:

$\overline{){\mathbf{v}}{\mathbf{\approx}}{\mathbf{(}}{\mathbf{331}}{\mathbf{+}}{\mathbf{0}}{\mathbf{.}}{\mathbf{60}}{\mathbf{T}}{\mathbf{)}}{\mathbf{m}}{\mathbf{/}}{\mathbf{s}}}$

Wavelength:

$\overline{){\mathbf{\lambda}}{\mathbf{=}}\frac{\mathbf{v}}{\mathbf{f}}}$

**(a)**

At 20°C, the frequency of sound will not change.

An unfingered guitar string is 0.73 m long and is tuned to play E above middle C (330 Hz). The finger is placed 0.242 m from the end of this string to play B above middle C (494 Hz).

What are the

(a) frequency and

(b) wavelength of the sound wave produced in air at 20°C