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The true meaning #447498
12/16/14 19:23
12/16/14 19:23
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AlbertoT Offline OP
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Hello

I see that nobody is posting anymore here, it is a shame
I ask a question

Who can explain in plain words the true meaning of the world most famous equation E = mc^2 by Einstein

It is not that simple as most people assume
I wonder myself if I grasp it laugh

Last edited by AlbertoT; 12/16/14 19:24.
Re: The true meaning [Re: AlbertoT] #447499
12/16/14 19:33
12/16/14 19:33
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Kartoffel Offline
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It means that mass and energy are closely related to each other (...or basically that mass is energy)

...so if you know the mass of an object, you can use the 'E = m * c²'-formula to calculate the energy that this object theoretically contains.

But I have't got a lot of knowledge about this. (I might even be wrong with all this, lol)

Last edited by Kartoffel; 12/16/14 19:36. Reason: ninja

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Re: The true meaning [Re: Kartoffel] #447524
12/18/14 17:24
12/18/14 17:24
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AlbertoT Offline OP
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If so
Is mass a synonimous with matter ?
or
Is mass just a property of matter i.e its Inertia ?

Re: The true meaning [Re: AlbertoT] #447525
12/18/14 18:05
12/18/14 18:05
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Michael_Schwarz Offline
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Yes, the faster you move, the heavier you get. The energy of motion turns into "m" your mass. This is why reaching lightspeed is practically "impossible" since the closer you are to lightspeed the heavier you become and thus in turn need a lot more energy to accelerate.


"Sometimes JCL reminds me of Notch, but more competent" ~ Kiyaku
Re: The true meaning [Re: Michael_Schwarz] #447526
12/18/14 18:21
12/18/14 18:21
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AlbertoT Offline OP
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So, you assume that mass stands for inertia since I dont think that the amount of matter can increase by increasing the speed
question
If mass is just a property of matter,why is the equation supposed to entail matter annihilation then ?

Re: The true meaning [Re: AlbertoT] #447527
12/18/14 19:45
12/18/14 19:45
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Michael_Schwarz Offline
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No, inertia is motion and motion is energy and energy is mass.

To get energy from a motionless object you have to extract the energy from it's mass, thus converting mass into energy. The matter is not annihilated, merely transformed.

It's the same principle as with energy and motors. The mechanical energy of a turbine is turned into electrical energy and the electrical energy is turned back into mechanical energy.

The same applies to energy (E), mass (m) and motion (c^2). Matter has mass except for a few (photons, gluons and gauge bosons) which in turn have to always move at the speed of light to make up for the lack of mass and thereby upholding the equation.

E=mc^2 accounts even for these exceptions (which Einstein didn't even know about at the time), which is why it's so important.

To answer your questions, yes mass is a property of matter. Matter has mass and volume and therefore is defined as matter. It's like asking of "trueness" is a property of a boolean: Yes it is, since a boolean is defined by having trueness and falseness. If it didn't have trueness (thus only having falseness) it would not be defined as a boolean anymore.

It's mass is a property of matter by definition, because if a "something" didn't have mass you couldn't define it as matter anymore. Same thing would work in reverse, if something had matter but no volume it wouldn't be matter either.

And as to expand on "The matter is not annihilated, merely transformed.": You have matter(mass + volume) of which you transform the mass into energy, and you are left with volume but no mass and since a "something" without both mass and volume is not matter anymore, the matter "ceases to exist" which can be misunderstood, but merely means that you have taken the mass away and what is left cannot be defined as matter anymore. It is not, in fact, annihilated.

Last edited by Michael_Schwarz; 12/18/14 19:50.

"Sometimes JCL reminds me of Notch, but more competent" ~ Kiyaku
Re: The true meaning [Re: Michael_Schwarz] #447528
12/18/14 20:26
12/18/14 20:26
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AlbertoT Offline OP
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Suppose you are in the year 1642, Newton is still in the cradle
you replace the term "mass" with the term "weight"
every body would a agree

Re: The true meaning [Re: AlbertoT] #447529
12/18/14 20:43
12/18/14 20:43
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Michael_Schwarz Offline
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What drugs are you on? Also: Can I have some?


"Sometimes JCL reminds me of Notch, but more competent" ~ Kiyaku
Re: The true meaning [Re: Michael_Schwarz] #447530
12/18/14 21:23
12/18/14 21:23
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Kartoffel Offline
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He didn't say anything about weight?

..also 'weight' is just an effect of the gravitational pull between physical objects caused by their mass.


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Re: The true meaning [Re: Kartoffel] #447531
12/18/14 23:20
12/18/14 23:20
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AlbertoT Offline OP
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Actually he did not say anything which makes sense

Weight is the effect of.... nowadays we know that

If you asked the question : what is matter ?
before Newton,people would answer , something like :

Its weight inside a volume

Weight was supposed to be a synonimous with matter , the weight of a body being , apparentely, a constant on the surface of the earth
All other properties shape, color, hardness etc can change but weight can not
Consequently weight was not supposed to be a property of matter rather the matter itself
For the same reason after Newton but before Einstein mass became a syonimous with matter even though , strictly speaking, it should be only a property of matter namely its Inertia

Einstein discovered that even the mass of a body is variable , consequently you should drop the equivalence

matter == mass

Same as you did with

matter = weight

The logical conclusion is that equation does not entail matter annhilation
Apparentely ;

you could lose mass without losing matter

Is above claim correct ?



The point is that even scientists speak of matter annihilation

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