A Very Loud Train Whistle Has an Acoustic Power Output

question 65

Multiple Choice

A very loud train whistle has an acoustic power output of 100 W.If the sound energy spreads out spherically,what is the intensity level in dB at a distance of 100 meters from the train? (I₀ = 10^-12 W/m²)

• A)78.3 dB
• B)81.6 dB
• C)89.0 dB
• D)95.0 dB

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Definitions:

Inegalitarian Countries

Nations characterized by a high level of inequality in terms of income distribution, social rights, and opportunities.

Middle and Working Classes

Social groups categorized by their economic status, occupational types, and levels of income, where the middle class typically includes those with moderate incomes and white-collar jobs, and the working class includes those with lower incomes and blue-collar or manual labor jobs.

Liberal Democracy

A political system characterized by free and fair elections, rule of law, and the protection of individual rights and freedoms.

Ruling Class

The social class that holds the dominant power in a societal hierarchy, often controlling resources and making key decisions.