Doppler Effect: a Bat Emits a Sound at a Frequency

question 65

Multiple Choice

Doppler effect: A bat emits a sound at a frequency of 30.0 kHz as it approaches a wall. The bat detects beats such that the frequency of the echo is 900 Hz higher than the frequency the bat is emitting. The speed of sound in air is 340 m/s. The speed of the bat is closest to

• A) 20.0 m/s.
• B) 530 m/s.
• C) 10.0 m/s.
• D) 30.0 m/s.
• E) 5.02 m/s.

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Definitions:

Adolescence

The transitional stage of physical and psychological development that generally occurs during the period from puberty to legal adulthood.

Adulthood

The period in human life after adolescence, typically marked by legal recognition of maturity and responsibility for one's actions.

Breeders

Usually refers to individuals or organizations that selectively breed plants or animals for specific genetic traits.