Which is not a general characteristic of starburst galaxies?
A) The observed features that cause us to classify a galaxy as a "starburst" galaxy must be only temporary phenomena in the galaxy's history.
B) The galaxy's rate of star formation is many times higher than the rate of star formation in the Milky Way.
C) Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space.
D) The "starburst" is thought to be caused by the presence of a supermassive black hole in the galaxy's center.
D) The "starburst" is thought to be caused by the presence of a supermassive black hole in the galaxy's center.
You might also like to view...
A parallel circuit consists of a 100 V DC power source, a 100 ? resistor, and a variable resistor of resistance R, which varies from 0 to 100 ?. The current in the circuit is
a.
directly proportional to R.
b.
inversely proportional to R.
c.
directly proportional to (100 ? + R).
d.
inversely proportional to (100 ? + R).
e.
neither directly nor inversely proportional to R or to (100 ? + R).
Which of the following played the most important role in the ring's formation?
A) Saturn's differential rotation B) Saturn's Roche limit C) Saturn's distance from the Sun D) debris from volcanoes on Mimas E) tidal resonance with Titan
If you do an experiment on earth, and then do an identical experiment in a jet plane moving uniformly at a high speed, you get identical results from both experiments. This is an example of
a. time dilation b. length contraction c. the equivalence of mass and energy d. the principle of relativity e. none of the above
Polarized light is to have its polarization plane rotated by 90°. In which of the following cases does the final beam have the greatest intensity? a. 3 polarizing filters, each rotate beam by 30°
b. 2 polarizing filters, both rotate beam by 45°. c. 1 polarizing filter, rotating beam by 90°. d. None of the above, polarized light can't be rotated.