CAPE Physics Unit 1 · 2007 (Specimen) · Paper 1 · Question Q26

A glass tube of effective length 0.60\text{ m} is closed at one end. Given that the speed of sound in air is 300\text{ m s}^{-1} the two LOWEST resonant frequencies are

1. (A)125\text{ Hz}, 250\text{ Hz}
2. (B)125\text{ Hz}, 375\text{ Hz}
3. (C)250\text{ Hz}, 375\text{ Hz}
4. (D)500\text{ Hz}, 750\text{ Hz}