A Bat Emits a Sound at a Frequency of 39

question 26

Multiple Choice

A bat emits a sound at a frequency of 39.0 kHz as it approaches a wall.The bat detects beats with a frequency of 827 Hz between the sound it emits and the echo bouncing from the wall.What is the speed of the bat if the speed of sound in air is 343 m/s?

• A)2.7 m/s
• B)3.0 m/s
• C)3.6 m/s
• D)5.4 m/s
• E)9.0 m/s

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Definitions:

Light Purity

The degree to which a light source emits a single wavelength, influencing the color's vividness or saturation.

Wavelength

The distance between identical points in the adjacent cycles of a waveform signal propagated in space or along a wire.

Saturation

A state or process in which a quantity has reached its maximum capacity or a point beyond which no additional absorption or reaction can occur.

Sensory Adaptation

A process whereby sensory receptors grow less responsive to stimuli that do not vary with time.