Batteries

9.1x10^ -31 kg for every electron added.

can't tell if serious

Fuck the simulation we are in is so well done.

Kudos whatever is out there.

Energy equivalent of an electron mass:

E = mc2 = (9.1x10-31kg)(3x108m/s)2 = 8.2x10-14J = 5.1x105 eV = 0.51MeV

No but capacitors do.

> charging a battery adds electrons

...

Batteries are capacitors.

Is this bait?

Doesn't it depend on the type of battery? I would think you are just moving the electrons to the other plate?

I can't think of a battery in which the electrons are actually released from the battery.

I am either overthinking the question or under thinking it

> I would think you are just moving the electrons to the other plate?
that's a capacitor.

Most batteries work by chemical reaction or moving ions

So what do you believe the answer is to OPs question?

Pretty sure they weigh more.
Not because I know of any scientific reason, but because I've weighed them on scales.

WTF fags? Batteries are not some kind of "eletron filled bucket" that you can pour out to use your electrons! If it was like that the charged battery would be overall negatively charged and would
1. repell a stream of water
2. repell each other
3. repell dust n shit
4. ...

You can ask a grown up to help you carry out any of these experiments, since obviously you are mentally at the age of 8.

For OP: No, a battery is not heavier if you charge it. When you use one, electrons flow from the cathode to the anode, if you charge it you push them back. Seriously just read a book!

It depends on what type of battery you're talking about.

For most typical consumer batteries (e.g. Li-ion, NiMH, lead acid), the weight is basically the same. Theoretically, there will be a tiny change in weight due to Einstein's famous equation relating energy to mass:

E=mc2

This effect will make a charged battery ever so slightly heavier than a discharged battery because it has more energy. But the change is very small.

Other types of batteries will absorb or release gasses during charge and discharge, and so their weight will change appreciably. For example, in Zn-air batteries (often used in hearing aids) oxygen from the air combines with zinc to form zinc oxide. As a result the battery gets heavier when you discharge it.

>This effect will make a charged battery ever so slightly heavier than a discharged battery because it has more energy
Lol.

Does compressed spring is heavier than uncompressed?

Yes. It has more energy and energy is mass ([math]E = m \mathrm c^2[/math]). So it will gain [math]m = \frac E {\mathrm c^2}[/math].

no, is this?

Oh yeah Mr. SmartyPants, if the electrons don't go in or out of the battery then how do you get energy out of it and into it? They even get warm when used or charged. Something is being removed at the very least. Heat doesn't come out of the ether on its own.

Theoretically, you could have a scale to measure the battery weight which will turn on/off the battery charger when it detects the battery has lost or gained x amount of weight during use or recharging.

When you charge a battery, a tiny demon discovered by physicist James Clerk Maxwell runs around, plucking electrons from out of the electric stream your charging method creates, putting them in a basket, then carefully hanging them onto particles lacking them on the other end, a bit like children decorating a Christmas Tree with ornaments. All of this happens quite quickly, because demons are known to move around at very high speed, but all the same, the larger the battery, the more work the little fellow has to do, and this extends the time needed to charge. Because the demon is trapped within the battery by a voodoo curse using the Black Cat on the Eveready logo, the net weight actually drops, because he loses weight from his exertions, but the additional electrons offset it perfectly...the weight remains constant.

It should be noted that charging a battery is therefore communing with the Unholy, but it's a worthwhile sin, as it allows us to talk on the cell phone and get porn on the go.

Does 1kg of dynamite is heavier than 1kg of stones?

Heat is caused by the internal resistance of the battery as the current (ie, flow of electrons) passes through the battery

Because dynamite explodes therefore it has energy stored as mass. Checkmate atheists

Depends on the type of battery
For example:
>lead acid
Looses weight when charged because some of the water in the electrolyte is electrolysed
>NiMH
Idk but I think that the cell expands when charged and thus becomes slightly more bouyant therefor being lighter
>you get the idea

But compression implies strain, and it's the stress-energy-momentum tensor that is relevant here.

This is great, may I save it?

youtube.com/watch?v=9ypaXNVPkSg

They are similar, but not the same.

What causes compression and strain though?

your momma sitting on my dick

1kg of anything has the same amount of energy in it as 1kg of anything else

...

Yes, however the difference is unnoticeable to humans as mass equivalence of he potential energy is very very very small.

E=M, assuming a natural notation or more commonly noted as E=M*C^2 for standard notation

In similar cases I typically found such values only mattered after 10^14. However some of the most advanced systems ever made anything passed 10^7 or in extreme cases 10^8 is considered worth noting.

So yes it get heavy, but it so small no one cares.

Hey, related question. I understand the electrons will move from one side of the battery to the other. The car sales guy mentioned that can shift the weight in the battery causing the car to get unbalanced and affect control of the car. He mentioned getting a "battery gyro" so this is neutralized. Is it worth getting or is the performance/maintenance impact minimal.

You're doing it wrong, virgin.

Mass =/= Energy

And object that has half its weight as mass and half its weight as energy will have more energy than an object that has a mass 100% of its weight.

...

No all batteries lose mass when they are charged due to chemical processes. Conversely some batteries lose or gain weight depending on type when they are discharged, also due to chemical changes.

im liking this bait

>mass/energy equivalence
>chemical

back to highschool with you, not even going to bother asking you to explain how they violate conservation laws

arent they both just energy cells?

When it's turned on? I'm guessing that the slight bit of charge gives it just a little more weight right?

I dunno dude. do you think the sun light weighs you down more just because it's shining on you?

but it does, user..
en.wikipedia.org/wiki/Radiation_pressure

Doesn't it? If ever so slightly there should be a transfer of momentum that weighs down on my body outside.

The reason why the lightbulb weighs more is because when it is off there is no charge flowing through the bulb and when it is on there is a certain amount of charge running through the resistor in the bulb that has mass. In the case of an upwards facing bulb, the apparent weight of the bulb would be higher than when it is turned off. Even if you did a force balance and considered the momentum of the photons (the change would be much much smaller than the weight of the electrons) So overall it still weighs more turned on.

First off, when the bulb is off it has the same amount of electrons in it as when it is on.

Second, the radiation pressure would depend on the orientation of the bulb, point it up and the bulb is heavier when on, point it down and the bulb is lighter. But this amount is immeasurably small and would be significantly less than natural random variations in mass due to countless other factors (adsorption/disorption of molecules on the surface, air currents, etc), so even if you could measure it, it wouldn't show up.

The light bulb probably weighs a tiny bit less when it is on due to temperature dependent desorption processes, but measuring that would also be extremely difficult.

For all practical purposes, the ligh bulb has no change in mass whether it is on or off.

don't use mass and weight interchangeably.
your rationalizations for why the weight is imperceptibly changed is true, but that does not account for change in mass.

a change in mass can be attributed to electrons in the filament being at higher energy than those in the ground state of the unenergized light bulb; and not much else.
would this change in mass be measurable on a balance? no.
would this change in mass be measurable in other ways? of course. the light bulb is on b/c it has more energy than the light bulb that's off, and energy == mass.

Right, with the radiation pressure bit I was assuming operation in a vacuum (with an evacuated interior to the bulb as well).

I forgot that the same amount of charge exists in the bulb though, that at least makes sense. Yes for all practical purposes it would not matter whether it is on or off. But isnt there still, if ever so slightly, a change in apparent weight based on orientation in a vacuum?

>dont use mass and weight interchangeably
>hurrr they arent proportional in a constant gravitational field

eat a fat dick, autismo

and you are so fucking wrong with your understanding of e=mc^2.

energy isnt mass, it has NO mass, and mass is not energy. that equation means they can be CONVERTED from one form to the other, through nuclear force exchanges. as to date, no process of conversion of energy to mass has been recorded, either.

Doesn't the molecules get off from the wire? (that's why the bulbs got black after a while, back in the day)
I guess if it's perfect nothing actually goes out so it won't change, but I guess the glass too with heat will lose some paricles.

PLUS

>First off, when the bulb is off it has the same amount of electrons in it as when it is on.
are you sure the density doesn't change? (spoiler: it does, so it changes also the number of e-)

J=c*E

so if we increase E the density is increased, thus we have more electrons when it's on

That has got to be the dumbest thing I've ever heard.

momentum is the conversion of mass to energy by non-stationary entities.
electrons at higher energy levels of an atom have higher momentum and that equates to higher mass

if you don't understand the material, i'd suggest reading some more

lol nice digits

In 2014 someone calculated the hypothetical mass of the entire internet and found that it is roughly the same as an average strawberry.

They are solvent

I don't think so, since you are just pushing electrons up a chemical gradient.
For every electron added one is taken away at the other node.

it would be difficult to test this because reactions at the nodes add corrosion which will make the battery heavier with oxygen and other atoms from the air.

rechargeable air batteries get lighter in fact.

>ad hominem
>beratement
>nothing added to the discussion

Technically speaking yes they do but not in any practical sense. battery acid can also deplete over time by sublimating into gaseous form, so the battery kind of gets lighter as time goes on regardless of how you charge it.

Pretty neat popsci. Got source?

youtu.be/WaUzu-iksi8