Compared to Earth, Venus spins very rapidly
Indicate whether the statement is true or false
FALSE
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Which of the following would be the closest estimate to the number of times the Sun has orbited the galactic center?
a. 1 b. 10 c. 25 d. 50 e. 100
Suppose that a symmetry argument of some kind tells us that the electric field in a certain region points in the +y direction and has a magnitude that depends only on y. For which of the following gaussian surfaces would it be easiest to calculate the net flux of the electric field?
A. A cubical surface oriented so that two opposite faces are perpendicular to the y axis. B. A spherical surface. C. A cylindrical can-like surface oriented with its central axis perpendicular to the y axis. D. A cylindrical can-like surface oriented with its central axis parallel to the y axis. E. A cone-like surface oriented with its central axis parallel to the y axis.
When a massive star begins to run out of hydrogen to fuse, its outer layers of gas ________.
A. expand and cool B. contract and heat C. contract and cool D. expand and heat
Which of the following is true of supermassive black holes?
A) They are found only in elliptical galaxies. B) They are not found in Seyfert galaxies. C) They can be triggered into eruptions because of tidal interactions. D) They are not affected by tidal interactions between galaxies.