When the outer envelope of a red giant escapes, the remaining carbon core is called a
A) black dwarf.
B) blue straggler.
C) white dwarf.
D) planetary nebula.
E) brown dwarf.
C
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First Law of Thermodynamics: During an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much heat is added to the gas during this process?
A. 0 J B. 50 J C. -50 J D. 25 J E. -25 J
Suppose an astronomer proposed to build a major observatory on the campus of your school. Would it make a good observing site? Explain why or why not
What will be an ideal response?
Which of the following statements about the moons of the jovian planets is not true?
A) Some of the moons are big enough that we'd call them planets (or dwarf planets) if they orbited the Sun. B) One of the moons has a thick atmosphere. C) Many of the moons are made largely of ices. D) Most of the moons are large enough to be spherical in shape, but a few have the more potato-like shapes of asteroids.
Consider an asteroid that orbits the Sun once every 5 years. Does this object ever cross the Earth's orbital path?
1.Yes, it must cross twice every five earth years. 2.No, it can never cross Earth’s orbital path. 3.Yes, it must cross once every Earth year. 4.It is impossible to tell.