Compared to the star it evolved from, a white dwarf is
A) hotter and brighter.
B) hotter and dimmer.
C) cooler and brighter.
D) cooler and dimmer.
E) the same temperature and brightness.
B
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How do absolute visual magnitude and luminosity differ?
What will be an ideal response?
Impedance: What inductance must be put in series with a 200-? resistor at 4.00 kHz to have a total impedance of 240 ??
A. 3.28 mH B. 4.28 mH C. 5.28 mH D. 6.28 mH E. 12 mH
Diagram 3-1 shows three approximate locations of the setting Sun along the western horizon. Which number indicates the location of the Sun at sunset on December 21 (winter Sun) for an observer at a latitude of 48° north of the equator? Choose the best answer
a. 1
b. 2
c. 3
d. The Sun will set in the east for an observer in the southern hemisphere.
e. The Sun will not set on December 21 at this latitude.
Elementary particles that experience the weak nuclear force but not the strong force are called
A) leptons. B) hadrons. C) mesons. D) bosons. E) baryons.