Question

the wavelength of two sound waves in air are 71/163 m and 71/160 m they produce 10 beats per second. calculate the velocity of sound in air ​

Answer 1

Answer:

Beat = n1- n2

n = frequency

frequency = velocity /wavelength

Beat = 10

10 = V/L1 - V/L2 (L = wavelength)

10 = v[1/L1 - 1/L2]

10 = V [ 163/71 - 160/71]

10 = V [ 3/71]

V = 236 m/s