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Thats not what he said persay Errorist, you would do well to check your dimensional analysis.
[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]
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E' = m, therefore m = E'
A transform exists that allows derivation of E from m and vice versa. But that transform is not the actual energy all by itself. Nor, mathematically, is the mass.
The dimensional analysis is very important, too. Units have to be treated as variables during the solution of this formula in order to have any claim to mathematical rigor, and when you're trying to make a point based on math, rigorousness is vital.
Let me point out a few statements... E does not equal E', so it won't work that way Errorist.
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It does if you plug in the right units.
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Not for E=MC^2 it doesn't.
[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]
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Then the formula E=MC^2 is mathmatically incorrect, based on what you are saying.
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No, the formula is correct, you just aren't using it correctly. Go ahead, apply units to E and M, and try to make it work.
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Ok, 2E=2M therefore 2M=2E. Still Mathmatically correct. Correct?
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No, what are the UNITS of E of M? Joules, degrees, meters, seconds, grams... that sort of thing.
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You tell me first what they are in E=MC^2 first?????
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Energy is usually measured in Joules or Kilojoules
Mass is usually measured in Grams or Kilograms
C is always 3x10^8 meters per second -or- 300,000 kilometers per second.
Go on, try it.
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Energy is force it is just another way to measure weight or mass.
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Nooo, energy is not always a product of a force by an object with mass, it is an entirely seperate concept.
In Fact, if you take E=MC^2 literally and ignore relativistic mass, it proves that energy is not mass... Go on, try it, put a 1000 Kilojoules in for E or a Gram for M and see what you get.
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Yes it is. How much force does it take to move mass? Energy is measured in force. Dynes,gram force,joules/centimeter,joules/meter,kilogram force,kilonewtons,millinewtons,newtons and pound force are just a few.They all use a certain amount of energy/force.
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Ummmm nooo its not, I think you have your units confused.
Energy is energy, just joules or calories. Look up an entry level physics text. You may be thinking work or power, which are not the same things as energy.
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Look up any conversion table, and see where energy is. It is measured as force or power.
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*checks*
Yep, energy is a seperate unit. It can be converted to force acting on a mass and such, but that is only after a conversion step.
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Well there you go. Energy equals mass after conversion. M=E therefore E=M.
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AH-HA!... you said the magic word...
"after conversion"
And if the two things were the same thing, then why would they need conversion?
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I didn't say it you said it. It still is the same thing like uno and one.
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I suppose I was trying to give you rope to lynch yourself with, but the mathematics remains... In order for your take on E=MC^2 to work, then the units don't come out. You must reduce the units of the equation to be Joules = Kg or g, which you cannot do. Also, an equation where all the units cancel out is meaningless. Identity functions, where M=M and E=E, are likewise meaningless.
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Would you agree that a photon has a certain amount of energy plus a certain amount of mass traveling at or near the speed of light?
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Energy yes, but mass by the inherint rest-mass definition, no.
Energy = Joules (J) or Kg x Meters^2 x Seconds^(-2)
Mass = Kg
C = 3x10^8 meters x seconds^(-1)
There is no way you can dance around and make J = Kg algebraicly using E=MC^2.
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Since the photon is not at rest then would you say the photon has mass?
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If you go argue this stuff on sci.relativity. You will here at least 10 people say that photons have mass but know rest mass. You will then see about 10 "crack pots jump in" and the discussion will quickly deteriorate. Even in special relativity, there is a more general equation then E=mc^2. IIRC the general equation includes a term due to rest mass mc^2 and a term due to momentum. In the case of light the momentum comes from the wavelength. With E=mc^2 you can conclude interesting things, especially using the particle wave duality. But I think it is only an approximation and better more general formulas exist.
Dig into the [url=http://child-civilization.blogspot.com/2006/12/political-grab-bag.html]political grab bag[/url] at [url=http://child-civilization.blogspot.com/]Child Civilization[/url]
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Energy is usually measured in Joules or Kilojoules
Mass is usually measured in Grams or Kilograms
C is always 3x10^8 meters per second -or- 300,000 kilometers per second.Go on, try it.
I've always used joules, kilograms and 2.998 x 10^8 meters per second.
I'd be laughed off my course if I gave an answer to an equation without showing which units the numbers referred to, E=MC^2 is a useless equation unless you know how to use it with the correct units in place of E.M.C.
There was a young lady named Bright.
Whose speed was far faster than light;
She set out one day
in a relative way
And returned on the previous night.
--Arthur Buller--
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