Homework Statement
Solve the differential equation. -x2(dy/dx) + xy = x2y2 * sin(x)
Homework Equations
None.
The Attempt at a Solution
I first figured out that this was a Bernoulli's equation. I distributed the x2 to make it simpler. From there I divided everything by y2 to get y-2(dy/dx) +...
If we can only see things that traveled 14 billion light years away (I think) or less, then why is there a so called observable universe? If everything started at a singularity, wouldn't we have already seen everything? It's hard to put this question into words. How can something be farther away...
I am familiar with String theory and the Multiverse theory, but I didn't know that apparently String Theory points to a multiverse? Can anyone give insight to this?
Also what do you guys think about the Multiverse theory? Personally it is far-fetched, but I am not dismissing it. I don't want to...
Yes, mis-type. No where I am getting caught up is you said 8 billion years ago is when inflation began, so the 5 billion years of expansion was based solely from the force of the big bang? Gravity did not crunch in 5 billion years? That is my question
Thanks, and yes I understand it's all hypothetical. While I've got your attention, I clicked the link in your signature and read how dark matter is causing inflation not expansion. Then I realize I never answered one of the most basic questions, or thought about it. If dark matter wasn't causing...
I see... so it seems like we are heading towards a 'mini' big rip? Only the local galaxies will be within the visible universe many years from now. Is that accurate?
From what I have gathered, dark matter is finite, correct? The more space expands, the less dense dark matter will be. So billions or trillions of years from today, space will have expanded a lot and the density of dark matter will decrease from a universal view. But if dark energy is a constant...
Actually scratch that. When I am getting the undergrad in Physics, will I be doing enough broad research and classes to help decide what field I want to go in? Right now I'm thinking Particle or Astro
Thanks for the replies! I want to work on the theoretical side, but what I am mainly asking is thoughts on choosing the specific degree I would major in.