so,
time moves constently. but at what rate? is it possible to difine the rate that time marches on. we use time to difine the rate of many other things. but what is the rate of time????


~dan

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I believe Einstein created the theory that time moves different for all things. However, I'm not a physicist, so don't quote me.

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This is what Classical Physics tells us. Call the time measured in your reference frame . This is called the "proper" time. Let t be the time as measured in another reference frame. Then the rate that time "moves" in your reference frame as measured by someone in another reference frame is . This is what Einstein worked out in his theory of Special Relativity, then extended in his General Theory of Relativity for curved space-times.

Quantum Physics, on the other hand, doesn't tell us anything at all. Both temporal and spatial variables are apparently nothing more than something to integrate over when doing a calculation. Time passes, but nothing in the theory seems to indicate how. Some have speculated that time is not even a continuous variable, but quantized somehow, so the concept of a "rate" of time is impossible to define. (If this sounds odd, note that you can't define the concept of speed in Quantum Physics either.) There is even the thought that time doesn't even exist...that it is merely an "observable" variable that helps define the state of the system in question and has no reality beyond being a mere parameter. In this case time is a kind of illusion that we see to make sense of differing quantum states.

Difficult question.

-Dan

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"I must not fear. Fear is the mind killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain." - The Litany Against Fear, "Dune" by Frank Herbert

Through the mathematical mind everything is simple. If it is not mathematically definied we do not care about it, we do not think about it. Time is not defined mathematically, rather it is a physically concepts (all do all physical concepts fail to have definitions). Thus, it does not bother us.
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However, I believe that if you travel back in time and change something in history then the effect is not instantenous. It creates something called a time disturtion field and requires a certain amount of time to effect the future as it travels through the time-space continuum.

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"Democracy has proved only that the best way to gain power
over people is to assure the people that they are ruling
themselves. Once they believe that, they make wonderfully
submissive slaves." - Joseph Sobran

GOOD POINT PH.

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maybe this is sort of like asking how much money costs....

does that sould like a simalar question to you guys?

Dan

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A rate is the rate of change of a quantity with respect to t, so the
rate of time is dt/dt = 1.

RonL

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Truth does not change because it is, or is not, believed by a majority of the people.

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An American dollar has no value, except in the minds of the masses.

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Would you then give me all of your US dollars(if you have any)? as you can see that statement is relitive to your definition of value...Or so I think


Dan

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interesting thought PH,
not sure how that all works though...

`dan

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As no one has ever even theoretically developed a way to travel backward in time, no one is sure how that all works. (Except for Star Trek fans! )

-Dan

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"I must not fear. Fear is the mind killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain." - The Litany Against Fear, "Dune" by Frank Herbert

The U.S. dollar used to be backed with gold. However, now it is just a piece of paper that people assign value to (it makes an interesting question of where inflation comes from)

BUT, I am part of the masses and will not give you anything

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like i said ...it's all about how you define value...


dan

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