O-LevelPhysicsWaves5054/12 · May/June 2014 · Q291 Mark
In an experiment to determine the speed of sound in air, a student stands 200 m away from a cliff and claps two pieces of wood together. His class-mates standing next to him start stopwatches when the two pieces of wood meet and stop the stopwatches when they hear the echo. Their times are: 1.44 s, 1.70 s, 1.58 s, 1.76 s. Which value for the speed of sound do they obtain?
A62 m/s
B123 m/s
C247 m/s
D340 m/s
✓ Correct answer
C: 247 m/s
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