You Are Driving Along a Highway at 35

question 62

Multiple Choice

You are driving along a highway at 35.0 m/s when you hear the siren of a police car approaching you from behind and you perceive the frequency as 1370 Hz. You are relieved that he is in pursuit of a different speeder when he continues past you, but now you perceive the frequency as 1330 Hz. What is the speed of the police car? The speed of sound in air is 343 m/s.

• A) 38.4 m/s
• B) 30.0 m/s
• C) 39.2 m/s
• D) 40.0 m/s
• E) 41.7 m/s

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Definitions:

COGS

Cost of Goods Sold (COGS) refers to the direct costs associated with the production of goods sold by a company, including material and labor costs.

Gross Margin

Revenue less cost where cost is spending closely associated with production. Stated in dollars or as a percent of revenue. A fundamental measure of a business’s strength.

Net Income

The total profit of a company after all expenses and taxes have been deducted from revenues.

Dividends

Monetary distributions from a company to its shareholders, often based on the profits of the business.