The Best Way to Reduce Our Unnecessary Waste of Energy

question 57

Multiple Choice

The best way to reduce our unnecessary waste of energy is to improve _____.

• A) solar cells
• B) hydroelectric power
• C) coal mining techniques
• D) energy efficiency
• E) hydrogen cells

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Definitions:

Constant of Proportionality

A constant ratio in a directly proportional relationship between two quantities, where one quantity is a constant multiple of the other.

Square Root

A value that, when multiplied by itself, gives the original number; it is represented by √.

Directly Proportional

A relationship between two variables where they increase or decrease at the same rate.

Wind Speed

A measure of the velocity of air movement at a particular location over a specified period of time.