Which are more massive, the black holes in X-ray binaries or those at the centers of galaxies?
A: Black holes in X-ray binaries are more massive.
B: Black holes in the centers of galaxies are more massive.
Ans: B: Black holes in the centers of galaxies are more massive.
You might also like to view...
The heating of a ferromagnet in an alternating magnetic field is due to
(a) Induced free electron current loops. (b) Alterations of atomic electron orbitals. (c) Switching of electron spin orientations. (d) Friction created by Bloch wall motion.
The most distant stars we can currently measure stellar parallax for are approximately
A) in the Andromeda Galaxy. B) 1,000 parsecs away. C) 5 parsecs away. D) 10,000 parsecs away. E) halfway across the Milky Way Galaxy.
A 3.00-kg mass is placed at (2.00, 3.00) m, and a 4.50-kg mass is placed at (2.00, ?3.00) m. What is the moment of inertia of this system of masses about the y axis?
a. 97.5 kg·m2 b. 15.0 kg·m2 c. 67.5 kg·m2 d. 30.0 kg·m2 e. 22.5 kg·m2
The quantum mechanical model of the hydrogen atom requires that if the orbital magnetic quantum number is 4, there will be how many permitted spin magnetic quantum numbers?
a. four c. three b. seven d. two