An Energy-Efficient Lightbulb Uses 15 W of Power for an Equivalent

question 10

Multiple Choice

An energy-efficient lightbulb uses 15 W of power for an equivalent light output of a 60 W incandescent lightbulb. How much energy is saved each month by using the energy-efficient lightbulb instead of the incandescent lightbulb for 4 hours a day? Assume that there are 30 days in one month.

• A) 5.4 kW·hr
• B) 1.35 kW·hr
• C) 21.6 kW·hr
• D) 1.8 kW·hr
• E) 7.2 kW·hr

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Definitions:

Biologically Hardwired

Refers to traits, behaviors, or instincts that are innate and genetically programmed rather than learned or acquired.

Naturalistic Fallacy

A logical error of equating what is natural with what is morally right or desirable.

Methodology

The system of methods and principles used in a particular discipline or field of study to gather and analyze data.

Evolutionary Psychology

A branch of psychology that studies how evolutionary principles help explain the structure and function of the human mind.