/sci/ - Science & Math

[Anonymous No.6717656]

If gravity is a force just like electromagnetism then why can't it be used to produce electrical energy?

[Anonymous No.6717660]

[Anonymous No.6717662]

>>6717656
http://science.howstuffworks.com/environmental/green-tech/sustainable/gravity-powered-lamp1.htm

[Anonymous No.6717663]

>>6717660
but that relies on the sun to recycle the water into the resivoir

[Anonymous No.6717666]

>>6717656

But it is. That's partially how dams work. Water at an elevated position held in a reservoir is charged with gravitational potential energy. When you open the floodgates, the water flows downstream, past a turbine, turning it, and generates electricity.

[Anonymous No.6717668]

>>6717663

And to produce electrical energy with electromagnetism, we have to push a magnet, which requires an outside power source as well.

Electrical energy isn't just spontaneously created. It's a transformation. The energy has to come from someplace.

[Anonymous No.6717671]

>>6717656
If you solve that problem you will win a nobel prize

[Anonymous No.6717672]

>>6717662
Okay, but i feel like you're using the same amount of energy to lift the wight than you're producing with the lamp. Aren't you just converting caloric energy into electrical energy? And on an industrial scale would a winch consume more energy to lift the weight than the machine would produce?

[Anonymous No.6717675]

>>6717656
you need time-varying magnetic fields to make electricity
a time varying gravitational field would work but Idk where to find one

[Anonymous No.6717678]

>>6717672

Yes, you're absolutely right. Gravity, due to the way it works is an excellent energy STORAGE medium.

Voltage is electromotive force. It -IS- an electromagnetic force. Any situation that generates an electromotive force is going to need an energy source of some kind.

To make it efficient, we try and externalize as much of the energy costs as possible(such as taking energy-dense chemicals from deep in the earth, where heat and pressure from the earth has done most of the work as the energy source in creating coal and oil and stuff), or we try to generate hydropower from water that recharges due to natural precipitation cycles, and the like.

[Anonymous No.6717683]

>>6717678
Will gravity keep creating heat from the pressure it imparts perpetually?

[Anonymous No.6717686]

>>6717683

That's negligible compared to the heat being generated from inside the earth. I went and did a little research to make sure.

You get about 25 degrees celsius per kilometer of depth when away from tectonic boundaries. And that energy comes from radioactive decay and residual heat from Earth's accretion, mostly.

It's not perpetual, but it will last an incredibly long time on geological scales of time...as in as long as this planet has a molten core, it will be significant.

[Anonymous No.6717687]

>>6717686
sweet
thanks amigo

[Anonymous No.6717719]

>>6717656
>gravity is a force just like electromagnetism
Mmmmno.

[Anonymous No.6717825]

>>6717656
isn't gravity just the curvature of space, and not actually a force

[WTFLEVI No.6717833]

because although it's a force it's not technically in the same field just as why can't we use kinetic energy as electricity (also gravity isn't like a magnet, it functions more like a negative monopole (a magnet with one pole) more then any thing which according to our current knowledge is impossible (unless something new happened))

[WTFLevi No.6717835]

>>6717825
no its just an example Einstein used it's not how it actually works in fact we do not have a definite answer to how it works

[Anonymous No.6719688]

>>6717656
Using that image when asking this question makes your question look about 3 times more retarded than it is without the image.

[Anonymous No.6720016]

>>6717835
Evidence points to the direction that gravity is the curvature of space-time.

What I think is not explained by General Relativity is why mass curves space-time, it explains how mass curves it and how curved space-time makes mass move.

[aether !MZfbsXC0kE No.6720019]

So mass is sometimes above and beyond the intelligence of humans.

/thread

[Anonymous No.6720073]

>>6719688
Cover your eyes.

[Anonymous No.6720095]

>>6717656
>implying electromagnetism isn't just a gauss

[Anonymous No.6720115]

it does create power but gravity is pretty weak so can't create much

[Anonymous No.6720131]

>>6720016
Mass curves spacetime like a ball curves a trampoline . and your question makes no sense. Mass bends spcetime becouse universe works like that. Why do protons pull electrons , why is the speed of light is the limit . These questions have no answers

[Anonymous No.6720158]

>>6717656
Isnt that minus?