Question

The frequency of the lowest standing-wave mode on a 1.0-m-long string is 20 Hz. What is the wave speed on the string?

A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s

Answer 1

Wave speed on the spring is 40 m/s

Step-by-step explanation:

Frequency for standing wave mode of an open- open tube is given by

`f_{} =(v)/(2L)`

where v is the velocity, L =1 m is the length

wave speed on the spring is

`v =2fL\\v=2* 20* 1\\v=40 m/s`