Hubble Space Telescope observations have shown that when the mass of the central black hole is very large, then
A) the mass of the halo and disk of the host galaxy is also very large.
B) the host galaxy is eventually completely consumed by the black hole.
C) the galaxy is always a spiral galaxy.
D) the mass of the bulge of the host galaxy is also very large.
D
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Which of these is an accurate statement of Newton's first law?
a. An object at rest tends to remain at rest. b. An object in motion tends to remain in motion. c. An object with no force acting along its direction of motion tends to move in a circle at constant speed. d. In the absence of an unbalanced force, the velocity of an object remains constant. e. In the absence of an unbalanced force, the speed of an object remains constant.
If the Sun suddenly became less massive, what would happen to Earth's orbit?
A) Spacetime around the Sun would become flatter, and the Earth, with its current momentum, would exit its orbit around the Sun. B) Spacetime around the Sun would become less flat, and the Earth would go plunging into the Sun. C) The Earth's orbital distance from the Sun would increase correspondingly. D) The Earth's orbital distance from the Sun would decrease correspondingly.
Pulsars are thought to be ________
A) unstable high-mass stars B) accreting black holes C) rapidly rotating neutron stars D) accreting white dwarfs
In Young's double-slit experiment, light coming from each slit arrives in phase at the first maximum on either side of the central bright fringe
Indicate whether the statement is true or false