Question

which of the following stars will spend the most time as a main sequence star?
3 solar - mass star
all stars spend the same amount of time as a main sequence star.
10 solar - mass star
2 solar - mass star
5 solar - mass star
1 solar - mass star

Explanation:

The lifetime of a main - sequence star is inversely related to its mass. More massive stars have higher core temperatures and pressures, which cause them to fuse hydrogen into helium at a much faster rate. A 1 solar - mass star (like our Sun) has a relatively long main - sequence lifetime compared to more massive stars. Stars with masses of 3, 5, 10 solar masses will fuse their hydrogen fuel much more quickly. And it's a well - known fact in stellar evolution that not all stars spend the same amount of time as main - sequence stars.

Answer:

1 solar - mass star