What property of a Cepheid variable can you determine if you know ...

[lidoalex]

What property of a Cepheid variable can you determine if you know its period?
 
  a. surface temperature
  b. absolute magnitude
  c. apparent magnitude
  d. mass
 e. radius

Question 2

When two objects of unequal mass orbit each other, the center of mass is ____.
 
  a. at the center of the more massive object
 b. at the center of the least massive object
 c. half way between the centers of each object
 d. always closer to the less massive of the two objects
  e. always closer to the more massive of the two objects

[nickk12214]

Answer to Question 1

b

Answer to Question 2

e

[lidoalex]

Thanks for the timely response, appreciate it

[xiaomengxian]

Gracias!