Author Question: Not only does the central engine of active galaxies and quasars require a black hole, but also ... (Read 45 times)

Medesa · **on:** Jul 27, 2018

Not only does the central engine of active galaxies and quasars require a black hole, but also ________ to provide the radiative energy.

A) a source of high-energy electrons for synchrotron radiation
B) globular clusters for food
C) a very strong magnetic field from neutron stars
D) a high rate of rotation for the black hole
E) an accretion disk of infalling matter

Question 2

Where did the elements heavier than hydrogen and helium come from?

A) They were produced in the Big Bang.
B) They evolved from hydrogen and helium shortly after the Big Bang.
C) They were produced inside dense interstellar gas.
D) They were produced inside stars.
E) All of the above