Answer:
[tex]A = 2.43*10^{-3} m[/tex]
Explanation:
power through string can be determined as shown in figure
[tex]P = 2\pi ^2 HVA^2F^2[/tex]
Where
P = 57.3 W
V = 13.87 m/s
H = 567 g/m
we know that
[tex]V = f *\lambda[/tex][tex]\lambda = \frac{v}{f}[/tex]
therefore [tex]P = 2\pi ^2 HVA^2(\frac{v}{f})^2[/tex]
[tex]57.3 = \frac{2\pi ^2 * 0.567 *13.87^{3}* A^2}{(5.54*10^{-2})^2}[/tex]
[tex]A = 2.43*10^{-3} m[/tex]
