A vibrating tuning fork of 725 Hz is held above a tube filled with water. Successive resonances are heard when the water level is lowered by 11.5 cm and 34.5 cm from the top of the tube. Calculate a value for the speed of sound. Hint: Remember the small end correction L at the top of the tube.)
A) 333 m/s
B) 343 m/s
C) 325 m/s
D) 315 m/s
E) 338 m/s

Question

Quizplus · Accepted Answer

The wavelength of the sound wave is twice the distance between the successive resonances, which is 34.5 cm - 11.5 cm = 23 cm. The speed of sound is then given by:v = f * lambda = 725 Hz * 0.23 m = 333 m/s

A Vibrating Tuning Fork of 725 Hz Is Held Above