An Ambulance Is Generating a Siren Sound at a Frequency

question 25

Multiple Choice

An ambulance is generating a siren sound at a frequency of 2,400 Hz.The velocity of sound is 345.0 m/s.The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 24.00 m/s away the observer.What is the frequency of the siren perceived by the observer?

• A) 2,448 Hz
• B) 2,424 Hz
• C) 2,400 Hz
• D) 2,376 Hz
• E) 2,352 Hz

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Definitions:

Catharsis

The process of releasing, and thereby providing relief from, strong or repressed emotions, often through art, drama, or psychological means.

Death Instinct

A concept in psychoanalytic theory referring to an unconscious drive toward decay, destruction, and death.

Thanatos

In Freudian theory, the destructive, death instinct.

Freud

Sigmund Freud, an Austrian neurologist and the founder of psychoanalysis, a method for treating psychopathology through dialogue between a patient and a psychoanalyst.