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 a known distance. She repeats the measurement five times.
| Measurement | Time / s |
|---|---|
| first | 2.1 |
| second | 2.5 |
| third | 2.2 |
| fourth | 2.4 |
| fifth | 2.3 |
Which value for the time should be used to calculate the speed of sound?
2.1 s2.1\text{ s}2.1 s
2.3 s2.3\text{ s}2.3 s
2.4 s2.4\text{ s}2.4 s
2.5 s2.5\text{ s}2.5 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.