A simple pendulum has a length of $1\mathrm{.}50$ m$.$

$9.$ What is the period of motion for the pendulum?

a$.2\mathrm{.}46$s

b$.8\mathrm{.}90$s

c$.12\mathrm{.}3$s

d$.16\mathrm{.}0$s

$10.$ What is the frequency of motion for the pendulum?

a$.0\mathrm{.}41$ Hz

b$.4\mathrm{.}89$ Hz

c$.11\mathrm{.}2$ Hz

d$.85\mathrm{.}0$ Hz

A wire with mass $40\mathrm{.}0$ g is stretched so that its ends are tied down at points $80\mathrm{.}0$ cm apart. The wire

vibrates at its fundamental frequency $60\mathrm{.}0$ Hz$.$

$11.$ What is the wavelength of the vibration?

a$.20\mathrm{.}0$

b$.40\mathrm{.}0$

c$.80\mathrm{.}0$

d$.160$

$12.$ What is the speed of transmission on the wire?

a$.33\mathrm{.}6/$

b$.66\mathrm{.}5/$

c$.96\mathrm{.}0/$

d$.129/$

$13.$ What is the tension in the wire?

a$.79\mathrm{.}8$

b$.134$

c$.461$

d$.666$