In the context of the mass-luminosity relation, a star with a mass of 2 solar masses on the main sequence would have a luminosity of approximately _____ solar luminosities.
A) 2.5
B) 4
C) 11
D) 0.5
Question 2
Which of the following statements is true of white dwarfs?
A) Some of them are among the hottest stars known.
B) Few of them are positioned in the upper-right corner of the Hertzsprung-Russell (H-R) diagram.
C) They have high luminosities.
D) They have a very big surface area from which they radiate energy.
