The Intensity of Sunlight Falling on the Earth Is About

question 40

Multiple Choice

The intensity of sunlight falling on the earth is about 1.4 kW/m2 (before any gets absorbed by our atmosphere) . At what rate does the sun emit light energy? (The earth-sun distance = 1.5 × 10⁸ km and the earth's radius = 6.4 × 10³ km.)

• A) 4.0 × 10²⁶ W
• B) 3.2 × 10²² W
• C) 7.2 × 10¹⁴ W
• D) 7.6 × 10⁸ W

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Definitions:

Clairvoyance

The supposed ability to gain information about an object, person, location, or physical event through means other than the known human senses.

Olfactory Sense

The sense of smell, which detects airborne chemicals and translates them into the perception of odors.

Telepathy

The supposed communication of thoughts or ideas by means other than the known senses.

Signal-Detection Theory

A psychological theory that explains how individuals distinguish between informative signals and noise in the environment under conditions of uncertainty.