Question

A standing wave measures 12 m between its first and fourth node and its frequency 325 Hz. What is the standing wave's speed?

1300 m/s
380 m/s
1500 m/s
750 m/s

Answer 1

1300 m/s

Step-by-step explanation:

Applying,

v = λf/2............... Equation 1

Where v = velocity or speed of wave, f = frequency of wave, λ = wavelength of wave.

From the question,

Given: f = 325 Hz, λ = (12×2/3) = 8 m

Substitute these values into equation 2

v = 325(8)/2

v = 1300 m/s.

Hence the standing wave speed is 1300 m/s

The right option is 1300 m/s