Question

1. why we move forward in time??????

2.can we get energy from nothing?

3.is universe infinite or just very big?/??????????

4.what came before big bang????

Answer 1

1.The arrow of time can be explained rather simply as the observation that we remember the past and not the future. We have access to history books and all other types of records about what's come before us, but no such information from the other direction.

2.IT DEPENDS what you mean by nothing. Ask a physicist about a vacuum, the very definition of nothingness for most of us, and they will tell you it is pulsing with activity. According to quantum theory, in a vacuum wave-like fields are constantly fluctuating, producing particles and their antimatter equivalents that fizzle in and out of existence. So even in the depths of interstellar space, there is plenty going on in what we call zilch.

3.We know that the universe is expanding because, with some nearby exceptions, almost every galaxy in the universe is moving away from us and from one another. Not only that, but very distant galaxies appear to be receding even more quickly, evidence that the universe is expanding at an increasing rate.

4.Cosmologists used to think the universe was totally timeless: no beginning, no end. That might sound mind-melting, but it’s easier on the scientific brain than figuring out what a set starting point would mean, let alone when it would be. So some physicists have cooked up alternative cosmological theories that make time’s role seem a little less important. The concepts are as trippy as those black-light posters you had in college. 

Answer 2

ⓗⓔⓨ ⓕⓡⓘⓔⓝⓓ ⓗⓔⓡⓔ ⓘⓢ ⓨⓞⓤⓡ ⓐⓝⓢⓦⓔⓡ

1)it is because time never stops. I think we are inversly proportional to time.

2)no from nothing we can't get energy. we have to do something to get energy.


3)I think universe is infinite.

4)Before big bang two planets were there and due to excess gravitional attraction these planets collide with each other and thus milky way galaxy formed


HOPE IT HELPS YOU