A Fire Engine Approaches a Wall at 5 M/s While

question 69

Multiple Choice

A fire engine approaches a wall at 5 m/s while the siren emits a tone of 500 Hz frequency. At the time, the speed of sound in air is 340 m/s. How many beats per second do the people on the fire engine hear?

• A) 0
• B) 15
• C) 29
• D) 63
• E) 250

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Definitions:

Hyperammonemia

A medical condition characterized by elevated levels of ammonia in the blood, which can be toxic to the brain.

PKU

Phenylketonuria is a genetic disorder characterized by an inability of the body to process the amino acid phenylalanine, leading to harmful levels in the blood if left untreated.

Phenylalanine

An essential amino acid that cannot be made by the body and must be obtained from food, important for the biosynthesis of other proteins and molecules.

Essential Amino Acids

Amino acids that cannot be synthesized by the body and must be obtained from the diet, crucial for various bodily functions.