Author Question: According to their rotation curves, most spiral galaxies: A) rotate as a solid body. B) rotate ... (Read 45 times)

Melani1276 · **on:** Jul 27, 2018

According to their rotation curves, most spiral galaxies:

A) rotate as a solid body.
B) rotate counterclockwise.
C) have decreasing rotational speeds with increasing distance.
D) contain dark matter.
E) contain dark energy.

Question 2

Most of the energy of the supernova is carried outward via a flood of:

A) gamma rays.
B) helium nuclei.
C) protons.
D) neutrinos.
E) positrons.