Answer: 
Explanation:
Given
Mass 
Spring constant 
Compression in the spring 
When the mass leaves the spring, the elastic potential energy of spring is being converted into kinetic energy of mass i.e.

The kinetic energy of the mass is 1.102 J.
I am so sorry, but I do not know what section you are talking about. I hope you find the answer.
No but the sun could be a white dwarf stellar remnant.
Answer:
A compound
Explanation:
2 or more elements mean its a compound