Active galactic nuclei is a term used to indicate the centers of quasars, radio galaxies, and Seyfert galaxies.
Answer the following statement true (T) or false (F)
True
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Harlow Shapley made the first accurate determination of the position of the center of the galaxy by studying ____
a. globular clusters b. open clusters c. emission nebulae d. spiral tracers e. stellar associations
Charge is distributed uniformly on the surface of a spherical nonconducting shell. A point particle with charge q is inside. The electrical force on the particle q is least when:
A) it is near the inside surface of the shell B) it is at the center of the shell C) it is halfway between the shell center and the inside surface D) it is near, but not at, the center of the shell E) all of the above (the force is zero everywhere inside)
An electron of mass 9.11 × 10^-31 kg moves with a speed of 0.800c. What is its momentum? (c = 3.00 × 10^8 m/s)
a. 3.64 × 10^-22 kg×m/s c. 6.03 × 10^-22 kg×m/s b. 2.05 × 10^-22 kg×m/s d. 1.34 × 10^-22 kg×m/s
The original nucleus and the final nucleus will be different isotopes of the same element for which decay scheme of the original nucleus?
a. a beta (electron) decay followed by an alpha decay b. a beta (electron) decay followed by neutron emission c. alpha decay followed by two beta (electron) decays d. two gamma decays