For low-mass stars, the life cycle phase that just precedes white ...

[bobypop]

For low-mass stars, the life cycle phase that just precedes white dwarf formation is
 a. planetary nebula.
  b. variable star.
  c. main-sequence star.
  d. red giant.

Question 2

The dilemma known as the ultraviolet catastrophe was resolved in 1900 by
 a. Bohr.
  b. Rutherford.
  c. Einstein.
  d. Planck.

[TDubDCFL]

Answer to Question 1

a

Answer to Question 2

d

[bobypop]

Thanks for the timely response, appreciate it

[parshano]

Gracias!