Heya user☺☺
All options are wrong here.
The correct answer is..
Work/Time.
Hope this will help☺☺
Protons and neutrons are packed together in a very small region called nucleus. Protons are positively charged and we know that like charges repel. Then how is it that protons are not repelling each other and flying away from nucleus?
You may think that gravitational force is holding all the protons together but it is not so. Gravitational force is many times weaker than repulsive force.
It is actually strong force which holds proton together. At this short distance, strong force comes into play and is several times stronger than the repulsive force.
It's momentum is twice as much.
I think 3 is 1.5...i kinda hope that helps for one
My guess would be about 10 years because stars are hot balls of light that are reflections from years ago so it would most likely take awhile
