A Certain Factory Whistle Can Be Heard Up to a Distance

question 55

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 × 10^-12 W/m².

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

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Definitions:

Small Businesses

Enterprises characterized by smaller sizes in terms of employees and revenues, playing a crucial role in economic development and innovation.

SBA Programs

Initiatives and services offered by the Small Business Administration to support and assist small business development and growth in the United States.

Set-Aside Program

Component of a government contract specifying that certain government contracts (or portions of those contracts) are restricted to small businesses and/or to women- or minority-owned companies.

Government Contracts

are agreements entered between companies and government entities for the provision of goods and services.