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 from point P to point Q. She does this six times.
The table shows her results.
| Measurement | Time / s |
|---|---|
| first | 1.1 |
| second | 1.4 |
| third | 1.2 |
| fourth | 1.5 |
| fifth | 1.0 |
| sixth | 1.6 |
Which value for the time should be used to calculate the speed of sound?
1.0 s1.0\text{ s}1.0 s
1.2 s1.2\text{ s}1.2 s
1.3 s1.3\text{ s}1.3 s
1.6 s1.6\text{ s}1.6 s
164 exam-style questions on CIE IGCSE Physics Physical quantities and measurement techniques, covering Physical quantities and measurement techniques. Each one has a worked solution and a mark scheme showing where the marks go.