A Very Loud Train Whistle Has an Acoustic Power Output

question 30

Multiple Choice

A very loud train whistle has an acoustic power output of 80 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) 88.0 dB
• C) 92.8 dB
• D) 95.0 dB

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Definitions:

Positive-Sum Game

A situation in game theory in which the sum of gains and losses is greater than zero, indicating that all participants can benefit from cooperation or competition.

Oligopoly

A market structure characterized by a few firms controlling a large portion of the market share, influencing prices and competition.

Competitive Ideal

An economic theory suggesting that markets perform optimally when there is a high level of competition among firms, leading to better products and services for consumers.

Product Development

The process of creating or improving a product or service, from initial idea through research, design, testing, and finally to launch.