/sci/ - Science & Math

quick q /sci/
I'm an engi/phys student and I've always had a passion for learning and questioning and gay shit like that

recently I was asked about why perpetual motion infinite energy em-drive kinda theories are defunct and I described the conservation of energy and the principle of entropy, but I got to thinking.

Imagine there was some way to create a sheet of material roughly the size of the Virgo Supercluster. Because its size is relativistic, it would experience Dark Energy expansion, correct? This would provide energy (while clearly finite, still incredible interesting) to the system, which could then be extracted.
My thought is pinching the material about the center (like a circus tent) and attaching something akin to a piston which by some force is disturbing the material sheet such that it is raised about the center. As it expands, the intermolecular forces contest with the force on the piston and if the material is strong enough the material returns to its standard position and the piston is moved.

Where did I go wrong? This seems improbable. I imagine there are many holes in my piston approach but I haven't enough study on the behavior of these forces to say why.

>>9764584
it's not the craziest idea. dark energy is still pretty god damn mysterious, and the expansion of the universe doesn't seem to have always been a positive acceleration.

Look at this diagram and just TRY to tell me that the accelerating expansion of the universe isn't a meme caused by bad measurements and dumbass theories.

Dark enerGy equations

energy=[(G*D)^1/2]hbar
energy=[(G*D)^1/2]e^2*z0
energy=[(G*D)^1/2]e^2/e0*c
energy=[(G*D)^1/2]e^2*u0*c
energy=[(G*D)^1/2]h*2alpha

power=c^5/G
force=c^4/G

Gravity Density

>>9388188
>0 views

>>8181800
>>8181363
Because the expansion of the universe is accelerating.

Save for the few blue shifted galaxies, before you get anywhere near them, the galaxies you are aiming for will be moving away from you at, relatively, faster than the speed of light. They, effectively, will no longer exist from your frame of reference, well before you ever reach them.

Unless FTL turns out to be a thing, of course. Even then, it'd have to be quite a lot faster than the speed of light for most galaxies (some sort of jump-drive teleportation like effect, of the sort no one even has a working hypotheses for, at the moment.)

>>7902070
The time I got really baked and learned about the accelerated expansion of the universe was magical

Is there any proof dark matter exists, or is everyone jumping to conclusions?
It seems like MOND explains the Galaxy Rotation Curve without using it.