Question

A string 1m long is drawn by a 300 Hz vibrator attached to its end. The string vibrates in three segments. The speed of transverse waves in the string is equal to

Answer 1

The string vibrates in 3 segments, this implies there are 2 crests, one trough (or vice versa)

Hence

$\sf{ \frac{3}{2} \lambda = 1} \\ \\ \sf\lambda = \frac{2}{3} m \\ \\ \sf we \: know \\ \\ \sf f = 300 hz \\ \\ \large \boxed{\sf \green{ v = \lambda f}} \\ \\ \sf v = 300 \times \frac{2}{3} \\ \\ \large\boxed{\sf \orange{ v = 200 \: {m}^{ - 1} }}$