A sound pulse is detected by two microphones. A fixed electronic delay is added to each measured time. The table shows the results.
| Microphone separation in m\mathrm{m}m | Measured time in ms\mathrm{ms}ms |
|---|---|
| 0.68 | 2.5 |
| 1.36 | 4.5 |
What is the speed of sound after allowing for the fixed delay?
302 m/s302\ \mathrm{m/s}302 m/s
272 m/s272\ \mathrm{m/s}272 m/s
340 m/s340\ \mathrm{m/s}340 m/s
680 m/s680\ \mathrm{m/s}680 m/s
112 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties, covering 4.1.1 Waves transfer energy and information, 4.1.2 Frequency, wavelength, amplitude, period and wavefronts, 4.1.3 Longitudinal and transverse waves, 4.1.4 The wave speed equations, 4.1.5 Measuring wave velocity, and 4.1.6 Calculating depth or distance from waves. Each one has a worked solution and a mark scheme showing where the marks go.