BB is an incomplete theory . A System Universe is more complete.

What constant ? To be clear

 

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\(9x10^{16} m^2/s^2.\)

 

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Why ?

 

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Because a moving object (whether car or photon) has an amount of energy equivalent to the square of its velocity.

To calculate the energy of a car, I would multiply its mass (1 ton) (actually, half its mass) by its velocity squared (20mph^2). this would give me its kinetic energy.

We're doing the same thing by converting matter into energy. We take the mass of the matter m, and we multiply it by the velocity of the resultant photons (which are moving at the speed of light). So, just like the car: mass times velocity squared.

It might make more sense to look at the more general case: \(E=mv^2\).
In the case of the car, v is about 20mph.
In the case of light, v is 300,000,000m/s.
You square each of those numbers in the calculation for energy.

 

Which cancel out .

E=m and M=e

In the physical .

Neither have anything to do with the speed of light .

 

You are hopeless.

Light is photons. Energy is photons.
When you convert a mass to energy, you get photons. They move at the speed of light.
The formula tells you how much energy you get when you convert the entire mass (say, via annihilation) into photons, moving at the speed of light.

River: Don't make assertions about things you do not understand. Instead, ask questions of people who do.

Here's a question for you: Why would I lie?

 

Why , why square any number , for the calculation ?

Mass = Energy

Energy = Mass

What's the point ? Of squaring ?

 

Do you think science is like writing a story?
Do you think we just make stuff up that looks good?
Do you understand that science is about modeling the natural world?
We don't get to choose what we like.

 

After all the time you have been on this forum and this where you are?

 

No that's where others are .

 

I asked the question , why in the equation E=mc^2 , c ; being the speed of light , is c^2 ?

The answer I got is this ; because , speed of light / per second / per second .

Which both cancel out to ; E=m .

If you disagree , no problem .

I'm open to reading your objections .

 

You got many, many more answers than that. Don't be obtuse.

River: they are not objections.
You are claiming 2+2=5 and then saying you're open to our objections.

Science is not an opinion-based hobby.

I have explained what c^2 is, and I have explained why it is what it is.

And, even simpler: c^2 does not cancel out. That is simply grade school math.

If you don't understand my explanations, that's fine. Say so. But this 'I just like my own way better' nonsense is becoming tiresome trolling.

When ignorant, ask questions; don't make assertions.

 

BTW, for all that I've been bustin' your balls, River, I have to thank you for forcing me to go into the nitty-gritty of why \(c^2\) is in Einstein's formula. I had never really considered the formula as a specific case of the more general energy formula \(E=1/2mv^2\).

Einsteins's formula is merely the same thing with one value filled in: \(v=c\).

 

(I can't wait to see the look on River's face when he discovers that that is not Einstein's formula - it's a shortcut. The full formula is \(E=m^2c^4+p^2c^2\). You actually rise c to the fourth power!)

 

Because that's what the realtionship is between energy and mass. It's a square relationship, not a linear one, so nothing can be "cancelled out".

 

Well, not really. c never changes, so c^2 is a constant. The relationship between mass and energy is linear.

What is a geometric relationship is that between velocity and energy. Double the velocity and you quadruple the energy.


Maybe this will help River:

It all comes down to the fact that the amount of energy a moving object has is equivalent to the square of its velocity. K~mv^2.

A 1 ton car, going 1mph has k kinetic energy (whatever k is, it's only for comparison).
The same 1 ton car doing 2mph has (2^2=) 4 times as much energy.
The same car doing 10mph has (10^2=) 100 times as much energy as the first.
The same car doing 100mph has (100^2=) 10,000 times as much energy.

If the car reached c, the speed of light (say, by being turned into photons) it would have c^2 as much energy.

 

You might as well be trying to explain this to an actual river.

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It will never happen, but it cracked me up.

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It does

How much energy does fission get , relative to the mass ?