-

5- A string fixed at both ends oscillates at a frequency of 25 Hz in a standing wave pattern. The position of the string at one instant is shown below. If the string is 1.2 m long, what is the speed of wave in the string?

1.2 m

A) 4.5m / s

B) 6.0 m/s

C) 10 m/s

D) 20 m/s