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How does a nebula change into a protostar?

Answer 1

Through collision of hydrogen atoms.

A nebula is made of clouds of gas and dust. There are hydrogen gas, of course, and hydrogen atoms. Due to gravity, hydrogen gas tend to clumped together, and the hydrogen atoms will start to spin and pulls up more hydrogen atoms that will cause collision. Collision of the hydrogen atoms causes the hydrogen gas to heat up. When the the temperature reach #15,000,000^@C#, nuclear fusion starts. A protostar is then formed.

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Answer 2

Hazel Asher

Gravitational collapse is the process that turns a nebula into a protostar. It starts with the gravitational attraction between particles within the nebula, which causes pockets of gas and dust within the nebula to collapse, increasing their density and temperature. As the collapse progresses, the central region of the nebula becomes denser and hotter, forming a protostar.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.