Physics (AS & A Level) · May / June 2019 · Paper 11 · Question 24

A long tube, filled with water, has a tap fitted at its base, as shown. A tuning fork is sounded above the tube and the water is allowed to run gradually out of the tube. A louder sound is heard at intervals as the water runs out of the tube. The change in water level between louder sounds is 32 cm. What is the wavelength of the sound in the tube?

1. A16 cm
2. B32 cm
3. C64 cm
4. D128 cm

As printed in the paper