What does the Big Bang Theory describe?

Answer 1

It attempts to describe the supposed beginning of the universe.

According to the Bing Bang Theory, the universe appeared out of nothing at all when a particular particle that had always existed collided with another one of those particles. Of course, there's no way to know where the first particle came from, but whatever.

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Answer 2

Hailey Alvarez

The Big Bang Theory, which explains the observed expansion of the universe, the abundance of light elements, and the cosmic microwave background radiation, describes the scientific model for the origin and evolution of the universe. It suggests that the universe began as an extremely hot and dense point approximately 13.8 billion years ago and has been expanding and cooling ever since.

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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.