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:

First-In, First-Out

A method of inventory valuation where goods purchased or produced first are sold first, assuming costs rise over time.

Total Cost

The aggregate amount of money spent or cost incurred in the production of goods or services.

Completed During

Usually refers to the tasks, projects, or productions that are finished within a specific period.

Equivalent Units

A concept used in cost accounting to indicate a quantity of production expressed in terms of fully completed units, calculated to measure and assign costs to partially completed goods.