The observed relationship of 1/500 between the masses of central black holes and the bulge masses of galaxies implies that
A) the black hole will eventually suck in the rest of the galaxy.
B) galaxy formation and supermassive black hole formation must be related somehow.
C) the biggest galaxies have the most luminous quasars.
D) quasars were more common 10 billion years ago than they are today.
B
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What happened to the "Impactor" of the Deep Impact mission?
A) It landed safely on the surface of the comet and returned material to Earth. B) It blasted the comet apart, thus preventing a potential Earth collision. C) It blasted straight through the comet leaving a small hole. D) It created a small crater on the comet. E) It missed the comet altogether.
Consider a situation where two moving objects collide, stick to each other, and move off together.Internal energy
a. remains constant. b. decreases. c. increases. d. varies but in a way that cannot be predicted.
The number of nucleons in a nucleus is the same as the number of neutrons plus the number of ______________
Fill in the blank(s) with correct word