Which of the following molecules could be a structural isomer for the underlined molecule below?
A) a
B) b
C) c
D) all of the above
E) none of the above
Answer: C
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When the outer envelope of a red giant is ejected, the remaining exposed core of a low mass star is called a
A. black hole. B. white dwarf. C. neutron star. D. red super giant.
The maximum intensity using coherent sources compared to the maximum intensity using random sources for sources of equal strength is that the maximum in the coherent case is
A) 0.707 times the incoherent. B) triple the incoherent. C) the same as the incoherent. D) half the incoherent. E) double the incoherent.
Kepler's first law of planetary motion implies that
a. the planets move at a constant speed at all points in their orbits. b. the planets all move around Earth in elliptical orbits. c. uniform circular motion is adequate to describe the motion of all planets. d. planets move in elliptical orbits around the Sun.
Which of these evolutionary paths is the fate of our Sun?
A) nova B) supernova of Type II C) planetary nebula D) supernova of Type I E) brown dwarf