Question $4,$ chap $116,$ sect $8.$

part $1$ of $110$ points

A piano string of mass per unit length $0\mathrm{.}00436k\frac{g}{m}$ is under a tension of $1930$ N $.$

Find the speed with which a wave travels on this string.

Answer in units of $\frac{m}{s}.$

Question $5,$ chap $116,$ sect $8.$

part $1$ of $1$

$10$ points

A steel wire in a piano has a length of $0\mathrm{.}6706$ m and a mass of $0\mathrm{.}004098$ kg $.$

To what tension must this wire be stretched in order for the fundamental vibration to correspond to middle C $(261\mathrm{.}6$ Hz on the chromatic musical scale$)?$

Answer in units of N $.$