A Car Approaches You at a Constant Speed, Sounding Its

question 473

Multiple Choice

A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is the frequency of the sound emitted
By the horn? The speed of sound in the air is 343 m/s.

• A) 70 Hz
• B) 68 Hz
• C) 72 Hz
• D) 69 Hz
• E) 71 Hz

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Definitions:

Vanilla Flavored Coffee

A type of coffee or coffee additive that has been flavored with vanilla.

Hazelnut Flavored Coffee

A type of coffee that has been infused with the flavor of hazelnuts.

French Roast Flavored Coffee

A type of coffee characterized by dark, charred beans, offering a strong flavor often likened to that of burnt caramel.

Back-Substitution

A method used in algebra, specifically in solving systems of equations, where you first solve one of the equations for one variable and then substitute that solution back into another equation to solve for another variable.