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Energy and Thermodynamics Fundamentals: Part 1

12 Questions

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Energy and Thermodynamics Fundamentals: Part 1

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Questions and Answers

What is an example of heat flow?

Boiling water cools surroundings (correct)

Heat does not transfer between bodies

Heat transfers from cold body to hot body

Heat always transfers from hot body to cold body

According to the 2nd law of thermodynamics, what theoretical efficiency is never attained?

75% efficiency

0% efficiency

100% efficiency (correct)

50% efficiency

If a coal-burning power plant can convert 1 ton of coal, containing 28,000 megajoules of chemical energy, into 7,000 MJ of electricity, what is the efficiency of the conversion?

25%

75%

50%

0.25% (correct)

In terms of quality, what type of energy is heat?

Low-quality Signup and view all the answers

What is happening to the entropy of the Universe over time?

Increasing Signup and view all the answers

What are some of the advantages and disadvantages of nuclear power?

Not versatile and hazardous Signup and view all the answers

What is the definition of potential energy?

Energy of position Signup and view all the answers

According to the first law of thermodynamics, what can be done with energy?

It can be transformed from one form to another Signup and view all the answers

What does the second law of thermodynamics state about entropy?

Entropy is the measurement of order Signup and view all the answers

What is the primary reason why gasoline is considered a high-quality energy source?

It is easy to convert into work or heat Signup and view all the answers

Why are wood and example of a low-quality energy source?

They are difficult for work use due to low energy concentration Signup and view all the answers

In terms of heat flow, what is another statement of the 2nd law of thermodynamics?

"Heat cannot pass from a cooler body to a hotter body without extra input of energy" Signup and view all the answers