You observe a nova. Based on current understanding, you can also conclude that you are observing
A) a close binary system in which one member is a white dwarf.
B) a close binary system in which one member is a neutron star.
C) the complete destruction of a white dwarf.
D) a close binary system in which both members are white dwarfs.
A) a close binary system in which one member is a white dwarf.
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Energy in the Electric Field: A -6.5-µC point charge is 8.0 cm from a -17-µC charge. What is the electric energy density at the point midway between them? (?0 = 8.85 × 10-12 C2/N ? m2, k = 1/4??0 = 9.0 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
What is thought to be the cause of Io's volcanoes?
A) Jupiter's magnetosphere and its charged particles B) Jupiter's gravity and the heat it creates C) tidal stresses from both Jupiter and Europa D) solar radiation focused by Jupiter's gravity E) radioactive decay in Io's interior
Sunsets are red because
A) the Sun emits more red light when it's setting. B) sunlight must pass through more atmosphere then, and the atmosphere scatters even more light at bluer wavelengths, transmitting mostly red light. C) sunlight must pass through more atmosphere then, and the atmosphere scatters more light at red wavelengths than bluer wavelengths. D) the cooler atmosphere in the evening absorbs more blue light. E) none of the above
The solar corona is much cooler than the Sun's surface; hence, we must wait for a total solar eclipse to glimpse it with the naked eye
Indicate whether the statement is true or false