Substituting “Distance divided by Time” in the equation "E=MC2 and then solving for "Time = ", how much does a second weigh at sea level?
[QUOTE=Will Repair]
Substituting “Distance divided by Time” in the equation "E=MC2 and then solving for "Time = ", how much does a second weigh at sea level?
[/QUOTE]
c in E = mc^2 is a fundamental constant. You can’t pick it apart.
[QUOTE=naita]
c in E = mc^2 is a fundamental constant. You can’t pick it apart.
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I’m no physicist, but I don’t think that’s the reason.
To the OP:
the question is nonsense. The equation shows as much because the units on the left side (energy) are also on a “time-squared” basis. For instance, a “joule” is a kilogrammm/(sec*sec). (kilogram times meters squared over seconds squared)
Energy is the amount of work done over a period of time, like the constant ‘c’ is a distance travelled over a unit of time.
IOW, the “seconds” come out of the equation.
Combine the last two answers-
treat C as a constant and then substitute “Kmm/Sec2” for E then solve for seconds.
1 Joule is defined as 1 kg m[sup]2[/sup] s[sup]-2[/sup]. So I guess you could say 1 second is equal to 1 m kg[sup]1/2[/sup] J[sup]-1/2[/sup].
You might as well ask “How much does a mile weigh?”
A second is 186,000 miles long however.
[QUOTE=Will Repair]
Combine the last two answers-
treat C as a constant and then substitute “Kmm/Sec2” for E then solve for seconds.
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No, don’t use the two answers.
Use mine.
The left side of the equation has sec^2 in the denominator; the right side has sec^2 in the denominator. They cancel when you try to solve for “1 second” (unless you want to solve for seconds in terms of “joules” but joules is not a weight. It has time in it.)
The speed of light in a vacuum is a constant, but it still has units, and the units are meaningful.
seconds is a measure of time. you can ask “if I use 5 joules of energy, how much mass can I move in one second” but that doesn’t tell you how much “mass” is in a second.
Are you folks serious, or is this going to come around to the Henway?
[QUOTE=AskNott]
Are you folks serious, or is this going to come around to the Henway?
[/QUOTE]
PLEEZE, don’t anybody ask!!!
[QUOTE=Trunk]
“if I use 5 joules of energy, how much mass can I move in one second”
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So you’re saying seconds have a proportional amount of mass and energy, that if seconds have such and such mass they also have to have a certain amount of energy?
[QUOTE=AskNott]
Are you folks serious, or is this going to come around to the Henway?
[/QUOTE]
I’m serious. I can understand that something traveling at the speed of light has /0 mass and is mathematically meaningless, well except for photons, but is solving for seconds as a unit of mass yield a result, even if it is one not easily understood?
A second is a DISTANCE in spacetime. Distances don’t have mass. As I said above, it’s equivalent to asking “How much does a mile weigh?”
[QUOTE=Will Repair]
… is solving for seconds as a unit of mass yield a result, even if it is one not easily understood?
[/QUOTE]
You can’t describe the second using only the unit of mass.
[QUOTE=Pochacco]
A second is a DISTANCE in spacetime. Distances don’t have mass. As I said above, it’s equivalent to asking “How much does a mile weigh?”
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Mass doesn’t have weight until you get within a certain distance to another mass! So a mile can be expressed as a relationship between two masses for a given weight, right?
[QUOTE=scr4]
You can’t describe the second using only the unit of mass.
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But we can describe it using a proportion of mass and energy?
or mass and energy and distance?
[QUOTE=Will Repair]
So you’re saying seconds have a proportional amount of mass and energy, that if seconds have such and such mass they also have to have a certain amount of energy?
[/QUOTE]
No, energy has seconds in it.
Simply put (but not perfectly accurate) energy is how much mass is moved in a second.
If I tell you
A) how much energy and mass I used, you can tell me the second
B) how much mass I moved in a second, you can tell me the energy
C) how much energy I used in a second, you can tell me the mass
Energy is an expression of how much mass is moved in a second. That doesn’t mean that a second has mass any more than a barbell has time.
[QUOTE=panache45]
PLEEZE, don’t anybody ask!!!
[/QUOTE]
Why not? What’s snew? 
[QUOTE=Will Repair]
Mass doesn’t have weight until you get within a certain distance to another mass! So a mile can be expressed as a relationship between two masses for a given weight, right?
[/QUOTE]
Yes, but when you do that the terms that represent the weight will cancel out, leaving only distance behind:
weight = (G * mass1 * mass2) / (distance * distance)
Where G is the gravitational constant.
distance = squareroot ( G * mass1 * mass2 / weight)
Looking at the units:
distance = squareroot ( newton * meter * meter * kilogram * kilogram / kilogram * kilogram * newton )
The kilograms and newtons cancel out.
distance = squareroot (meter * meter)
distance = meter
See … no mass or force in the final answer. You can’t use gravitiational attraction to express distance as a weight. Time works the same way.
1 s = 4.04x10[sup]35[/sup] kg
(Hint: convert everything into Planck units.)
[QUOTE=Pochacco]
Yes, but when you do that the terms that represent the weight will cancel out, leaving only distance behind:
weight = (G * mass1 * mass2) / (distance * distance)
Where G is the gravitational constant.
distance = squareroot ( G * mass1 * mass2 / weight)
Looking at the units:
distance = squareroot ( newton * meter * meter * kilogram * kilogram / kilogram * kilogram * newton )
The kilograms and newtons cancel out.
distance = squareroot (meter * meter)
distance = meter
See … no mass or force in the final answer. You can’t use gravitiational attraction to express distance as a weight. Time works the same way.
[/QUOTE]
Quod erat demonstrandum, or, as my old Math teacher used to say, Quite Enough Done.