A Certain Siren Radiates Sound Uniformly in All Directions

question 85

Short Answer

A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0 × 10^-12 W/m².

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Definitions:

Indirect Approach

A communication strategy where the main point or request is presented after providing background information or building a rationale, often used to soften negative news.

Information Providing

The act of supplying data or facts to help someone learn or make decisions.

Main Idea

The central or most important thought, concept, or assertion that an article, paragraph, or piece of writing conveys.

Overall Subject

The main theme or topic that encompasses the entire content or discussion within a document or conversation.