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

[jCorn1234]

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.

[aadams68]

Answer to Question 1

FALSE

Answer to Question 2

A

[jCorn1234]

Gracias!

[amit]

Excellent