Author Question: Which of the following is evidence for supermassive black holes in active galaxies? A) the ... (Read 155 times)

kfurse · **on:** Jul 27, 2018

Which of the following is evidence for supermassive black holes in active galaxies?

A) the discovery of powerful jets coming from a compact core
B) rapid changes in the luminosity of the galaxy nucleus
C) quasars emit approximately equal power at all wavelengths from infrared to gamma rays
D) very high speed orbital motions around galactic nuclei
E) all of the above

Question 2

Carol is going away from you at 75 km/hr, and Sam is going in the opposite direction away from you at 90 km/hr. According to Carol, how fast is Sam going?

A) Carol sees Sam going away from her at 75 km/hr.
B) Carol sees Sam going away from her at 90 km/hr.
C) Carol sees Sam going away from her at 15 km/hr.
D) Carol sees Sam going away from her at 165 km/hr.
E) Carol sees Sam coming toward her at 15 km/hr.