MCAT Question of the Day
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    Q:

    		 Which of the following is true regarding an ambulance approaching a pedestrian sitting near a street?
    		 

    A

    		 The frequency heard by the pedestrian is lower than the frequency of the approaching siren.

    B

    		 The frequency heard by the pedestrian is higher than the frequency of the approaching siren.

    C

    		 The distance between the wave crests emitted by the siren is higher in front of the ambulance than behind the ambulance.

    D

    		 The pedestrian will not notice a change in pitch after the ambulance has passed.



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