Question: A siren has a frequency of 950 Hz when it and an observer are both at rest. The observer then starts to move and finds

A siren has a frequency of 950 Hz when it and an observer are both at rest. The observer then starts to move and finds that the frequency he hears is 1000 Hz.

(a) Is the observer moving toward or away from the siren?

(b) What is the speed of the observer?

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