in It will be use by core hydrogen and later it will convert into helium. Later on they shrink and heat up and star become luminous them use to. Now the nuclear fusion exhaust all the hydrogen in the star core.
Hey Jhon do you understand fusion when it have low mass?
So when the fusion have low mass they spend billion year by using fusing hydrogen and convert to helium by using proton-proton chin.
So how does it effect.
It effect by convection zone and determine how similar to the sunspot cycle for the sun. But some of them have really deep conviction while the other have rotate very quickly meaning it will twist the star magnietic field.
After they effect how they will be use?
Now what is the life time for the low mass star?
During the star (low mass) life time it proptinoul mass divide by it luminosity to M/L. About 1 star luminosity about 3.5 power of it mass L M 3.5. usually 1 star with mass 4 time the sun. The life time would be around 1/4 or 1/32 solar life time
I never new this lot of math to calculate life time of star!!!