A 50% Efficient Hydroelectric Power Plant Generates Electricity from Water

question 57

Multiple Choice

A 50% efficient hydroelectric power plant generates electricity from water falling a height of 110 m and at a rate of x kg/s.If the maximum possible power output of the plant was 27.0 MW,what is x?

• A)25,000 kg/s
• B)50,000 kg/s
• C)100,000 kg/s
• D)5100 kg/s
• E)510,000 kg/s

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Definitions:

Unknown Quantity

A variable or value within a mathematical problem or equation that has not yet been determined or identified.

Proportion

A constituent, allotment, or figure regarded in context with its aggregate.

Unknown Quantity

A variable or value in mathematics and algebra that is not known or specified.

Proportion

A mathematical concept indicating the relationship between parts of a whole or between different quantities expressed as a fraction or ratio.