Potential: The electron-volt is a unit of
A. charge.
B. electric potential.
C. electric field.
D. electric force.
E. energy.
Answer: E
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Thermodynamic Devices: A reversible engine takes in heat at a rate of 555 W and exhausts heat at 482 W.(a) How much power does it produce?(b) What is its efficiency?(c) If operated in reverse as a refrigerator, what would be its performance coefficient (COP)?
What will be an ideal response?
Which of the following statements about Pluto is true?
A) It has more in common with other icy objects in the Kuiper belt than it does with the jovian planets (Jupiter, Saturn, Uranus, Neptune). B) It is the most massive object that orbits the Sun beyond the orbit of Neptune. C) It is orbited by only one moon. D) It is the only object in our solar system that is categorized as a "dwarf planet."
A laser beam (l = 694 nm) is incident on two slits 0.100 mm apart. Approximately how far apart (in m) will the bright interference fringes be on the screen 5.00 m from the double slits?
a. 3.47 × 10^-3 b. 3.47 × 10^-2 c. 3.47 × 10^-4 d. 3.47 × 10^-6 e. 3.47 × 10^-5
An ideal gas is confined to a container with adjustable volume. The pressure and mole number are constant. By what factor will volume change if absolute temperature doubles?
a. 4.0 c. 1/2 b. 2.0 d. 1/4