Answer
The speed of waves in a stretched string depends on:
(a) The tension in the string
Work Step by Step
We can write an equation for the wave speed in a string:
$v = \sqrt{\frac{F}{m/L}}$
We can see that the wave speed is determined by the values of $m$, $L$, and the tension $F$.
The speed of waves in a stretched string depends on:
(a) The tension in the string