CAPE Physics Unit 1 · 2017 · Paper 1 · Question Q21
Item 21 refers to the following diagram which represents the waveform produced when a speaker is held over one open end of a pipe of length 85\text{ cm}.
If the speed of sound is 340\text{ m s}^{-1}, what is the waveform's fundamental frequency?
- (A)
35\text{ Hz} - (B)
70\text{ Hz} - (C)
140\text{ Hz} - (D)
200\text{ Hz}
This question uses a figure or table from the paper — you'll see it when you practise.
The answer is shown once you've answered.
Practise this question