The Intensity of a Certain Spherical Wave Is 8

question 69

Multiple Choice

The intensity of a certain spherical wave is 8.0 W/m² at a distance of 1.0 m from the source. If the medium is isotropic and nonabsorbing, the intensity 100 m from the source is

• A) 8.0 W/m².
• B) 6.4  10^-4 W/m².
• C) 1.9  10^-4 W/m².
• D) 8.0  10^-4 W/m².
• E) 1.9  10^-6 W/m².

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Definitions:

Sympathetic Nervous System

A division of the autonomic nervous system that activates the "fight or flight" response during perceived threats.

Stress

A feeling of emotional or physical tension that can come from any event or thought that makes one feel frustrated, angry, or nervous.

Sexual

Pertaining to, involving, or characteristic of sex, sexual activity, or sexual reproduction in living beings.

Calm

A state of peacefulness and tranquility, free from stress or agitation.