| Date | November 2016 | Marks available | 1 | Reference code | 16N.1.SL.TZ0.17 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 0 |
| Command term | Question number | 17 | Adapted from | N/A |
Question
A student stands a distance L from a wall and claps her hands. Immediately on hearing the reflection from the wall she claps her hands again. She continues to do this, so that successive claps and the sound of reflected claps coincide. The frequency at which she claps her hands is f. What is the speed of sound in air?
A. \(\frac{L}{{2f}}\)
B. \(\frac{L}{f}\)
C. Lf
D. 2Lf
Markscheme
D
Examiners report
[N/A]
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