As a Train Starts from Rest and Then Accelerates Down

question 27

Multiple Choice

As a train starts from rest and then accelerates down the track,coming toward me faster and faster,the speed of the sound waves coming toward me will be

• A)slower than the normal speed of sound in air.
• B)equal to the normal speed of sound in air.
• C)some constant speed faster than the normal speed of sound in air.
• D)faster and faster.

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Definitions:

Willingness To Pay

The maximum amount an individual is prepared to spend to procure a good or service or to avoid something undesirable.

Consumer Surplus

The split between the total amount consumers are prepared to spend on a good or service and the actual amount they spend.

Demand Curve

A diagram that displays the connection between the cost of a commodity and the level of demand for it within a set timeframe.

Producer Surplus

The difference between what producers are willing to accept for a good or service versus what they actually receive, measured above the supply curve to the equilibrium price.