The work performed by a heat engine
A. equals the heat energy exhausted from the engine.
B. equals the heat energy entering the engine.
C. equals the net heat flow into the engine.
D. equals the change in the internal energy of the engine.
Answer: C
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Max von Laue is known for his work with
A. double-slit interference. B. single-slit diffraction. C. x-ray crystallography. D. holography. E. magnetic resonance imaging.
A person consumes 2 200 kcal/day while expending 3 200 kcal/day. In a month's time, about how much weight would this person lose if the loss were essentially all from body fat? (Body fat has an energy content of about 4 100 kcal per pound.)
a. 15 pound b. 22 pounds c. 7.3 pounds d. 3.7 pounds e. 29 pounds
The cratering of the lunar highlands shows us:
A) they are younger than the maria. B) they are older than the smoother maria. C) they have been unchanged for the last 4.6 billion years. D) they are like the Earth's continents, removed from the tectonic cycle of the mare. E) they were made of more rigid lavas than the basalts that made the maria.
The fact that the sky is dark at night shows that the observable universe cannot extend forever
Indicate whether the statement is true or false