$(9$a$)$ A $129\mathrm{.}4$ cm long, $7\mathrm{.}80$ g string, fixed at both ends, oscillates in its $n=3\mathrm{.}00$ mode with a frequency of $649\mathrm{.}0$ Hz and a maximum amplitude of $3\mathrm{.}14$ mm $.$ What is the wavelength of the oscillation? $8\mathrm{.}63{10}^{-1}m$

You are correct.

You are correct.

Your receipt no$.$ is $166-2798(7)$ Previous Tries

$(9$b$)$ What is the tension in the string?

Incorrect. Tries $\frac{1}{10}$ Previous Tries