Curious about something

If the total sum of energy in the universe does not change, and we are bound inside of this universe, then are we not lost as consumers of energy?

i dunno lol

depends if the universe is a closed system

I think you're stating a pseudo-problem based on undefined terms like "sum of energy", "bound inside" and "consumers of energy", but you're so unintelligible it's hard to be sure.

Maybe if there's a time like Killing vector field.

>>1
Is this a word play, i don't get it. We already are not considered as such. Many measurements and calculations employ local variables and we are energy consumers in that local system. But if you really can see and interpret universe as a whole, you are right, that is the correct way of looking at it.

>>2
best answer =]

Well, energy doesn't change but entropy does. And you can kind of exchange them for each other, I think?

I would like 3 of your finest entropies, sir.

you dont consume energy, you transform it into other forms of energy (i.e. motion, heat)

Also, energy can be exchanged for matter.

>>11
lol what

>>12
E=mc^2, haven't you heard?

also, if it hasn't been mentioned yet: heat death of the universe

>>13
So you just have to divide some energy by c^2 and it'll turn into mass for you?

>>14
Yes. That's exactly what happens. Have you never done that before? Boy, you sure missed out!

preposterously astonishing! absolutely stimulating!

>>14
The reverse process, creating energy from mass is quite common. It is observed when particles and their anti-particles collide with each other and called annihilation radiation. For example electrons and positrons colliding will emit two gamma rays (light) at around 512keV photon energy.

To create mass from energy you need to concentrate sufficient energy in a small enough volume. European scientists plan to build a laser that, when focused to a small enough spot, will create particles in vacuum.

>>17

Wow someone who is actually right.

>>17 To create mass from energy...
I like idea more of where you get energy to stick together and thats how energy becomes more mass.

Remind the class again the definition of UNIverse, please.