In Terms of Generating Electricity,fuel Cells Are ________ Than Thermal-Conversion

question 25

Multiple Choice

In terms of generating electricity,fuel cells are ________ than thermal-conversion machines because the chemical energy of a fuel is ________.

• A)less efficient;converted into electricity with an intermediate combustion cycle.
• B)less efficient;converted directly into electricity without an intermediate combustion cycle.
• C)more efficient;converted into electricity with an intermediate combustion cycle.
• D)more efficient;converted directly into electricity without an intermediate combustion cycle.
• E)about the same in terms of efficiency;converted into electricity with an intermediate combustion cycle.

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Definitions:

Body Mass Index

A numerical calculation using a person's weight and height to determine their overall body fat and health risk categories.

Overweight

A condition where an individual has more body weight than is considered healthy for their height, often measured by body mass index (BMI).

85th Percentile

A statistical value where 85 percent of observations fall below this point, often used in growth charts to indicate levels above which might be considered overweight or at risk.

Body Fat

The portion of the human body composed of fat tissue, essential for energy storage, protection of internal organs, and thermal insulation.