Author Question: Despite varying masses, all spiral galaxies look essentially the same. Indicate whether the ... (Read 87 times)

jCorn1234 · **on:** Jul 27, 2018

Despite varying masses, all spiral galaxies look essentially the same.

Indicate whether the statement is true or false

Question 2

How does a black hole form from a massive star?

A) During a supernova, if a star is massive enough for its gravity to overcome neutron degeneracy pressure in the core, the core will collapse to a black hole.
B) Any star that is more massive than 8 solar masses will undergo a supernova explosion and leave behind a black hole remnant.
C) If enough mass is accreted by a white dwarf star that it exceeds the 1.4 solar mass limit, it will undergo a supernova explosion and leave behind a black-hole remnant.
D) A black hole forms when two massive main-sequence stars collide.
E) If enough mass is accreted by a neutron star, it will undergo a supernova explosion and leave behind a black-hole remnant.