Many Physical Quantities Are Connected by Inverse Square Laws, That

question 102

Multiple Choice

Many physical quantities are connected by inverse square laws, that is, by power functions of the form . In particular, the illumination of an object by a light source is inversely proportional to the square of the distance from the source. Suppose that after dark you are in a room with just one lamp and you are trying to read a book. The light is too dim and so you move the distance to the lamp. How much brighter is the light?

• A) times
• B) times
• C) times
• D) times
• E) times

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Definitions:

Equivalent Units

A measure used in cost accounting to represent the amount of work done on partially finished goods, expressed in terms of fully completed units.

Materials Entered

The recording of raw materials introduced into a production or manufacturing process, taking note of their quantity and value.

Equivalent Units

A measure used in cost accounting to express the amount of work done by manufacturers in terms of fully completed units, accounting for partially completed goods as well.

Physical Units

A measure of quantity in terms of countable items or units, often used in production and inventory contexts.