A standing wave on a string 1.5 m long with both ends fixed has three antinodes. If the frequency of the wave is 200 Hz, what is the speed of the wave on the string?

200 m/s

Explanation:

We are given that

Length of string=L=1.5 m

Number of antinodes=n=3

Frequency of the wave=f=200 Hz

The relation between the length and wavelength

Using the formula

The relation between the velocity,frequency and wavelength

Using the formula

Hence, the speed of the wave on the string=200 m/s

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this