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Help me in Thermal Concept Physics!! [beginner]
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Hey guys again, I was wondering if there is a physics pro here? or at least a person with a strong basics in Mechanics. If we can talk online on AIM please leave your sn here because I have a lot of questions!! I'll be on around 7pm Central America. Mine's "That Green Arrow" anyways here goes. = By what facotr does the rate of radiation from a body increase when the temperature is increased from 100C to 200C ? The equation is change of Q over Change in Time. WHAT ?! is this even where you begin ??! I have a lot of long problems that will need conversions! Please help me!! Thank you!!!!!!!!!!!!!!!! very VERY much! |
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Re: Help me in Thermal Concept Physics!! [beginner]
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by SuicidopoliS
on 2007-05-29 09:11:06
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?????????????????? DQ/DT is not the equation you use when considering body radiation ( be it black or gray, doesn't matter ). That would be Planck's Radiation Law... "DQ/DT" reminds me more of the relation between warmth and temperature when talking about gas and stuff... The point is, there is a linear relation between DQ en DT, thus: Q = C.T where C is a constant whose value depends on the situation you're working in ( isovolume, isobar, type of gas... ). So i'm guessing you're asking by what amount the warmth of a certain amount of gas will increase when going from 100C to 200C? And i'm guessing those are degrees Kelvin, and not Celsius??? Are you sure you read that question right? .oO° Life's THE CURE, the rest are details! °Oo. |
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Re: Help me in Thermal Concept Physics!! [beginner]
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hmm i kinda thought the relationship was something like emission, E = (planck's constant) * T^4 so the rate increases by a factor of (200/100)^4 = 16 not too sure ^^ my brain's on vacation mode now |