Question

[OU.03]The table below shows the initial masses of four stars.

Name of Star Star 1 Star 2 Star 3 Star 4
Initial mass of star (in Solar mass) 9 0.9 5 0.3

Which of these best shows the stars in the increasing order of the time for which they will stay on the main sequence?

Answer 1

The stars in increasing order of main-sequence time are Star 4, Star 2, Star 3, and Star 1.

Step-by-step explanation:

In general, more massive stars have shorter lifetimes on the main sequence compared to less massive stars. From the given table, we can arrange the stars in increasing order of their main-sequence lifetime:

1. Star 4 - Initial mass of 0.3 Solar masses
2. Star 2 - Initial mass of 0.9 Solar masses
3. Star 3 - Initial mass of 5 Solar masses
4. Star 1 - Initial mass of 9 Solar masses

Therefore, the stars, in increasing order of the time for which they will stay on the main sequence, are Star 4, Star 2, Star 3, and Star 1.

Answer 2

Choices:
Star 1, Star 2, Star 3, Star 4
Star 1, Star 3, Star 2, Star 4
Star 4, Star 3, Star 2, Star 1
Star 4, Star 2, Star 3, Star 1

My answer would be: Star 4(0.3), Star 2(0.9), Star 3(5), Star 1(9)