In the context of star sizes, which of the following statements ...

[CBme]

In the context of star sizes, which of the following statements is true of a star's luminosity?
 
  A) A hot star may not be very luminous if it has a small surface area.
  B) The luminosity of a star is proportional to its visual wavelength.
  C) A cool star can be luminous if it has a small surface area.
  D) The luminosity of a glowing object is determined by its density.

Question 2

The diagram below shows two stars in a binary system and the center of mass of the system. Based on the diagram, the ratio of the mass of star A to the mass of star B is _____.
 
  A) 2:1
  B) 1:2
  C) 1:3
  D) 3:2

[Natalie4ever]

Answer to Question 1

A

Answer to Question 2

B

[CBme]

YES! Correct, THANKS for helping me on my review

[duy1981999]

Thanks for the timely response, appreciate it