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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

Respuesta :

Answer:

Wave speed on the spring is 40 m/s

Explanation:

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

[tex]f_{} =\frac{v}{2L}[/tex]

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

wave speed on the spring is

[tex]v =2fL\\v=2\times 20\times 1\\v=40 m/s[/tex]

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