The speed of sound in air is 340 m/s.
The speed of infrared waves in air is 300 000 000 m/s300\,000\,000\text{ m/s}300000000 m/s.
Which row in the table gives a possible frequency and speed of an infrasound wave in air?
| Frequency / Hz\text{Hz}Hz | Speed / m/s\text{m/s}m/s | |
|---|---|---|
| A | 10 | 340 |
| B | 10 | 300 000 000300\,000\,000300000000 |
| C | 1000 | 340 |
| D | 1000 | 300 000 000300\,000\,000300000000 |
Row A
Row B
Row C
Row D
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.