A Bat Emits a Sound at a Frequency of 39

question 33

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? 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:

Suspensory Ligament

A fibrous tissue that connects the lens of the eye to the ciliary body, adjusting the lens's shape for focusing.

Cones

Photoreceptor cells in the retina of the eye responsible for color vision.

Vitreous Humor

The clear, gel-like substance that fills the space between the lens and the retina of the eyeball.

Intrinsic Eye Muscle

Muscles located within the eye that control its movements and the shape of the lens for focusing.