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Transcript
18. Which of the following is NOT true about black holes:
_____
A) the closer you are to a black hole the slower time passes for you to an outside observer
B) light can not escape them
C) because of their immense density they can always suck in anything
D) light is redshifted while leaving the potential well
E) we have no knowledge of what happens beyond the Schwartzchild radius
19. What characteristic is most fundamental in determining the star's evolution?
_____
A) initial temperature
B) initial location
C) initial luminosity
D) initial color
E) initial mass
20. Which is the closest in size to a White Dwarf?
_____
A) the Sun
B) Jupiter
C) Earth
D) a small city (~10 km)
E) a car
21.The force of the Sun's gravity on the Earth is:
_____
A) the cause of Earthquakes
B) greater than the force of the Earth's gravity on the Sun
C) negligible during Spring Equinoxes
D) decreasing over time, causing Earth's rotation to slow
E) equal to the force of the Earth's gravity on the Sun
22. The main sequence lifetime of a solar mass star is _____ years
_____
A) 4.5 million years
B) 10 million years
C) 4.5 billion years
D) 10 billion years
E) none of the above
23. The stellar spectral sequence is:
A) OABFGKM
B) ABFGKMO
C) OBAFGMK
D) OGBKFMA
E) OBAFGKM
_____