In an experiment to measure the speed of sound, a student uses a stopwatch to find the time taken for a sound wave to travel between two points, P P\,P and QQQ. She repeats the measurement six times.
| Measurement | Time / s |
|---|---|
| first | 0.8 |
| second | 1.1 |
| third | 0.9 |
| fourth | 0.7 |
| fifth | 1.2 |
| sixth | 0.7 |
Which value for the time should be used to calculate the speed of sound?
0.7 s0.7\text{ s}0.7 s
0.8 s0.8\text{ s}0.8 s
0.9 s0.9\text{ s}0.9 s
1.2 s1.2\text{ s}1.2 s
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.