A Certain Factory Whistle Can Be Heard Up to a Distance

question 18

Multiple Choice

A certain factory whistle can be heard up to a distance of 2.5 km. Assuming that the acoustic output of the whistle is uniform in all directions, how much acoustic power is emitted by the whistle? The threshold of human hearing is $1.0 \times 10 ^ { - 12 } \mathrm {~W} / \mathrm { m } ^ { 2 }$

• A) 2.6 mW
• B) 0.026 mW
• C) 0.079 mW
• D) 0.26 mW
• E) 0.79 mW

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Definitions:

Undue Burden

A legal standard used to determine whether a law or its enforcement is excessively burdensome or restrictive on an individual or group.

Parent Corporation

A corporation that owns a controlling interest of another corporation, called a subsidiary corporation.

Subsidiary

A subsidiary is a company that is completely or partially owned and wholly controlled by another company, known as the parent company.

Commingled Assets

The mixing of assets or funds belonging to different owners, making it difficult to distinguish one's property from another's.