Horizon: How Big Is the Universe? (T) Mon 21:00
- Thread starter Trunks
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Not at all. If you are creating electricity by creating matter, then you are creating matter, what process is needed t create it. Its merely the next step down from the previous question, which didnt draw such a comment. Why should it now? 
No because a glass has nothing to do with water. Its a man made thing versus natural and as such non compatible on the same scale
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heat is energy - heat doesn't lose energy. Heat is the sensation of the presence of energy. Cold is just a description of an unnaceptable amount of heat energy defined by our own parameters.
I was always taught you can't create energy [or destroy it], only alter it from one type into another i.e. potential to kenetic.
So there is no more or less energy than there ever has been, it's just in a different state now than what it was. So if you need mass to make electricity [energy] there is no more or less mass than there ever has been, only now it's occupying a bigger space, or spread out over a bigger area?
But then like everything - surely it must have come from somewhere?
I haven't even watch the program and I'm still confused...
So there is no more or less energy than there ever has been, it's just in a different state now than what it was. So if you need mass to make electricity [energy] there is no more or less mass than there ever has been, only now it's occupying a bigger space, or spread out over a bigger area?
But then like everything - surely it must have come from somewhere?
I haven't even watch the program and I'm still confused...
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Heat does loose energy. the thermal bridge is always from hot to cold; for example when putting an ice cube into a drink, it is not the ice that cools the drink but the heat in the liquid trying to warm up the ice cube thus loosing it's energy.
Similar thing happens with heat loss through windows in a house.
Thank you. And energy requires matter. Heat is basically energy from molecular movement or radiant heat (heat by energy transfer through infra-red lightwaves) "cold" being the absence of heat merely requires that no heat be present. Just as I said about an empty glass; "dry" does not exist as "something" It's just the absence of water.
No heat is energy. Heat is a measure of energy.
It's hot == lots of energy
It's cold == not much energy
heat cannot lose energy.
it's the equivalent of saying:
My Inches have lost length. An inch is a measure of length.
We werent talking about a vacuum though. We were talking about hot and cold
Actually if we're talking about space, we ARE talking about a vacuum.
No. Heat IS energy. It dissapates and transfers to become a different type of energy (heating air causes a ballon to rise but as the heat energy dissapates, it becomes potential energy of the mass of the ballon held aloft or kinetic energy of the same ballon decending.
Reminds me of another "rule" I remember from school - "Energy can neither be created nor destroyed, just converted from one form to another".
Maybe we struggle with the idea of something from nothing because all around us things come from something then go back into something else. We are born, we grow, we die. Go back far enough and the earth will not have formed, go forward far enough and it will be no more. Same applies to the sun. But in each case we can trace the path of energy that temporarily is arranged to form an earth and a sun and then is re-arranged in another form.
Something from nothing crashes through all those notions. Yet at some point we have to confront it I suppose.
Language falls short when discussing fundamental issues. Check out Wittgenstein: Tractatus Logico-Philosophicus
If matter is energy, then what is anti matter? Whats the opposing force to energy?
That was Newtonian physics. It also stated that matter could not be created or destroyed. However the nuclear bomb does just that. The smallest particle of matter is an atom; if you split that atom, then it is no longer matter. But doing so "creats" an enormous amount of energy. As my university physics professor taught it, matter and enegy are a continum. One can be destroyed to creat the other but the total between the two remain the same. At least in our ability
However the Big bang theory states that BOTH were simultaneously created.
My last post for now as I have to go to a Dr.'s appt.
Aye, agree with that. The ability to see something and describe what you see is often extremely difficult. How would one describe a colour to a blind person?
