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/sci/ - Science & Math

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4216924 No.4216924 [Reply] [Original]

Is energy a physical entity?

>> No.4216934

> anime pic
> shit thread
Why every time? Why?

>> No.4216937

>>4216934

You're on 4chan.

>> No.4216949
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4216949

yes in a way
energy can be mass or charge
or the speed of a particle
energy can be everything in the universe something like universal currency

>> No.4216956

>>4216949

When mass is converted to energy, what change is taking place?

>> No.4216964

>>4216956
Your applying something to change the forces. what you are talking about is generally splitting or combining atoms. this is converting nuclear forces into motion/heat forces.

>> No.4216966

>>4216937 hurr

>> No.4216974

>>4216964

So energy is just a concept?

>> No.4216994

>>4216956
mass converted into what form of energy?

for example a battery weighs more when it's charged
when you discharge it that mass is either converted to light through a light bulb or motion through electric motor
there is no such thing like pure energy

even matter antimatter annihilation transfers its energy to creating elementary particles, light, etc.

>> No.4217021

>>4216994

But how does the conversion happen?

Is energy just the set of which matter and antimatter etc are subsets?

>> No.4217061

>>4217021
well the short answer is nobody knows

for example nobody knows how a photon is absorbed by an electron
or how an excited electron emits a photon

it's not like balls hitting other balls
it's just fundamentally different at that scale
and we'll probably never know how exactly it happens
but it's not essential for making predictions
the math works regardless of the way it happens

>> No.4217078

Read this: http://www.colorado.edu/physics/phys1110/phys1110_fa10/Feynman_energy.pdf

If you're a lazy fucktard, then watch this: http://www.youtube.com/watch?v=r_IfV9fkBhk

>> No.4217309

>>4217078

It takes way less effort to read a page and a half PDF than it does to watch an hour long lecture.