In its most energetic phase, a quasar can probably only last:
A) a few days.
B) a few years.
C) a few thousand years.
D) a few million years.
E) a few billion years.
D
You might also like to view...
Answer the following statement(s) true (T) or false (F)
1. The electric field inside a conductor must be zero in all possible circumstances. 2. In static equilibrium, any excess charge on a conductor is uniformly spread on its surface. 3. A closed metal can (in static equilibrium) will perfectly shield a point in its interior from the static field of any external charged particle(s). 4. If the electric field at any point inside a conductor is nonzero, the metal is not in static equilibrium.
If the masses of two planets doubles and the distance between them also doubles, the force between them would be
A) one-quarter. B) half as much. C) twice as much. D) four times as much. E) none of the above
Of the following energies for photons, which is the least energy that could result in photoelectron production if the work function is 3.77 eV?
a. 2.72 eV b. 3.19 eV c. 4.57 eV d. 6.98 eV e. 6.53 eV
Sound in a vacuum is impossible
Indicate whether the statement is true or false