A Sound Wave Radiates from a Source Uniformly in All

question 50

Multiple Choice

A sound wave radiates from a source uniformly in all directions. If the power of the sound source is 200 watts, then the intensity level of the sound wave 1000 m from the source is

• A) 62.8 dB.
• B) 66.0 dB.
• C) 68.5 dB.
• D) 70.5 dB.
• E) 72.0 dB.

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Definitions:

Demand

The desire to own goods or services combined with the ability and willingness to pay for them.

Demand Curve

A curve on a graph that exhibits the quantity of a good that consumers are prepared to buy at different prices.

Income

Regular earnings from employment or investment returns.

Product

An item that is created through a process and is offered for sale to consumers in the market.