Question

A police car moving at 10 m s−1 emits siren 40 min of each other. (a)...

A police car moving at 10 m s−1 emits siren 40 min of each other.
(a) What is the distance between the two events as measured by
(i) the policeman.
(ii) a stationary observer at the roadside.
(b) what can you conclude from your calculations?

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