CAPE Physics Unit 1 · 2011 · Paper 1 · Question Q25

When measuring the speed of sound in air, different vibrating tuning forks are held over the open end of a resonance tube and the length of air column lowered until the first loud note is heard. The following graph shows how the resonant length varies with \frac{1}{\text{frequency}}. The value of the intercept, L_o, on the L-axis indicates the

1. (A)end correction of the tube
2. (B)amplitude of the sound
3. (C)wavelength of the sound
4. (D)shortest resonant length of the tube

This question uses a figure or table from the paper — you'll see it when you practise.