A unified model of active galaxy cores can explain different types of Seyfert galaxies, quasars and other active galaxy types by differences in the ____.
a. mass of the supermassive black hole
b. size and thickness of the accretion disk
c. magnetic flux strength in the jets
d. amount of dust in the accretion disk
e. tilt of the accretion disk to the line of sight
Question 2The position of an absorption or emission line is useful in determining the ____.
a. temperature of an object
b. distance to an object
c. chemical composition of an object
d. motion of an object across the observer's line of sight
e. motion of an object toward or away from the observer
Question 3The motion of gas in accretion disks and jets is ____.
a. well explained by Einstein's theory of general relativity
b. poorly understood, but may depend on magnetism
c. well explained by Kepler's laws.
d. poorly understood, but may depend on relativity
e. well explained by electromagnetic wave theory
Question 4The wavelength of maximum intensity is useful in measuring the ____.
a. surface temperatures of an object from their colors
b. distance to an object from their colors
c. chemical composition of an object
d. motion of an object across the observer's line of sight
e. motion of an object toward or away from the observer
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