<span>Matter of all types have gravity, which causes it to attract to each other. The most efficient way for all this matter to congregate is the sphere. As they consolidate, they form the shape. As they compress, temperatures in the center of the mass start to go up and if it hits the proper point, it can ignite and become a star.</span>
Answer:
a quantitative observation because it includes numerical data
frequency is equal to number of oscillations or vibrations upon time
therefore,
check picture
Answer:

Explanation:
The problem is solved using the law of conservation of energy,
So



