A student notes that thunder is heard 15 s after a lightning flash seen at a hill 4.5…
PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
A student notes that thunder is heard 15 s after a lightning flash seen at a hill 4.5 km away. The student records the speed of sound as 0.3 km/s. Explain in not more than two sentences why this value must be converted before it can be compared with the standard value given in metres per second.