A Boy on a Bicycle Approaches a Brick Wall as He

question 20

Multiple Choice

A boy on a bicycle approaches a brick wall as he sounds his horn at a frequency 400.00 Hz. The sound he hears reflected back from the wall is at a frequency 408.00 Hz. At what is the speed is the boy riding his bicycle toward the wall? Assume the speed of sound in air is 340 m/s.

• A) 3.68 m/s
• B) 333 m/s
• C) 6.67 m/s
• D) 6.80 m/s
• E) 3.37 m/s

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Definitions:

Abrasion

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Laceration

A jagged, open wound in the skin that can extend down into the underlying tissue.

Puncture

A small hole made by a sharp object, particularly in the context of breaking the skin as part of a medical procedure or injury.

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