A normal heat engine is used to drive an electric generator. Part of the power from this generator runs a refrigerator that absorbs the waste heat from the engine and pumps it back into the hot reservoir.
A. first kind
B. second kind
A. first kind
B. second kind
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Why would the English system of units be more useful if a foot contained 10 inches?
What will be an ideal response?
RLC Circuits: A 120-V rms signal at 60.0 Hz is applied across a series combination of a 30.0-mH inductor and a 100-? resistor. What is the rms value of the voltage across the inductor?
A. 0.700 V B. 119 V C. 100 V D. 13.5 V E. 120 V
Which of the following best describes how modern astronomers view astrology?
A) Astrology played an important part in the development of astronomy in ancient times, but it is not a science by modern standards. B) Astrology is a synonym for astronomy. C) Astrology was a great idea until it was disprove by the work of Copernicus, Tycho, Kepler, and Galileo. D) Astrology is new age mumbo-jumbo that was a waste of time when it was invented thousands of years ago and remains a waste of time today.
What evidence do we have that the center of our galaxy is a powerful source of energy and a supermassive black hole?
What will be an ideal response?