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Thermodynamics
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by
on 2007-02-27 02:09:10 |
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Hmm... pardon for my low level of science education. But i was wondering... If heat goes from a hotter region to a colder region... so, wont heat from the sun go into deep into space? If so, isnt greenhouse effect abit good? cause the heat may be contained in Earth longer. (unless we got fried 1st ~.~)  A friend of today is an enemy of tomorrow. I am an empty shell. I don't feel loved at all |
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Re: Thermodynamics
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Our atmosphere is what protects us from the sun's rays and it keeps in heat for those on the dark side of the Earth (they also get heat from the earth itself though).
The next witty thing I think of and remember will likely end up here.
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Re: Thermodynamics
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by none123456
on 2007-02-27 18:13:40
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Um... sorry to go against you Draconis, but I believe Reinforce is right (heat going from hotter to a colder region). The hotter the object it has, the more energy it has. Thus, unless kept in a completely isolated system (impossible in reality that i know of), energy will be transferred from one body of MORE energy to LESS energy. It is a thermodynamic law. Heat is a form of energy. As for heat going from the sun into deep space, I am not 100% sure, but I'll attempt an answer. First of all, there is more than one type of way in which heat is transmitted from one area to another. One in which a solid hot object heats up another object it's touching is conduction (pardon me if i got vocab wrong). Another is the movement of heat in liquids (convection). Obviously this doesn't apply to space as there is not enough particles to effectively transmit the heat. Instead, there is a completely different way of explaining it. As I said before, heat is ENERGY. Well, what I believe happens is that there is energy created from the Sun (not only infrared, there's visible light, UV, etc). This energy is able to travel through space as electromagnetic waves, eventually hitting a body or object (ex. Earth). This body then absorbs the energy (not all of it), which is then translated into the heat of particles. Greenhouse effect: Heat may be contained in Earth longer but in the long run that can be bad as well. Think of the Earth as an object that is able to absorb and dissipate certain amounts of energy. Greenhouse gases, by keeping heat internally reflected, increase the amount of energy the Earth can absorb. The problem is, if more heat energy is stored within Earth, the higher the global temperature needs to be to equalize the absorption and dissipation of energy. As the temperature rises, many problems may come from changes in climate. I hope that helps. |
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Re: Thermodynamics
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by MiCHiYo μ
on 2007-02-28 05:57:44 (edited 2007-02-28 06:02:22)
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and bring you there. i shall keep this thread open until i find that other thread. Forget it. I'm answering it. *types outside in wordpad. will edit post again later.* -michiyo- 
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Re: Thermodynamics
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don't worry about going against me, I'm just in high school physics. To be honest we were just introduced to this stuff a few weeks ago.
The next witty thing I think of and remember will likely end up here.
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Re: Thermodynamics
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by
on 2007-02-28 10:52:15 (edited 2007-02-28 10:59:15)
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Draconics, you seriously need to get your facts strait before running your mouth off like that. The ozone is destroyed by CFCs, not greenhouse gasses. The greenhouse effect does not AMPLIFY waves of light! Rather, greenhouse gasses reflect outward-radiated heat back inwards. With any significant decrease or increase in greenhouse gasses in the atmosphere, the Earth would become uncomfortably cold or hot, respectively. To answer the original question: yes. the sun's energy is lost to deep space in the form of photons. heat is not a "thing" so it cannot "travel" from place to place. heat it is a measure of internal kinetic energy; motion of particles. when the particles that make up the corona of the sun jiggle around, some of their energy is lost as electro-magnetic radiation (see: light). light comes in quanta called photons. you can imagine the energy loss the sun experiences as an out-flux of photons, along with some other particles. 
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