A Siren of Frequency 3

question 45

Multiple Choice

A siren of frequency 3.20 kHz moves away from a stationary observer with a speed of 30.5 m/s.If the speed of sound is 335 m/s,the frequency heard by the observer is

• A)2.66 kHz
• B)2.93 kHz
• C)3.49 kHz
• D)3.52 kHz
• E)3.84 kHz

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Definitions:

Marginal Revenue Curve

A graphical representation showing how marginal revenue varies as output varies.

Demand Curve

A graph that represents the relationship between the price of a good and the quantity demanded by consumers at various price levels.

Easy Entry And Exit

A characteristic of competitive markets where there are minimal barriers for new firms to enter or exit the market.

Perfect Competition

A theoretical market structure that features no barriers to entry, a large number of sellers and buyers, completely homogenous products, and perfect information available to all market participants.