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Please help! No-ne seems to know this area of physics!! watch

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    Looking for a bit of feedback for the following question:
    Compare the rate and flow of heat per unit area through a solid brick wall and that of a cavity wall, filled with insulating foam. Assume steady state conditions,parallel flow and that the outside and inside temperatures are 21 cent and 1 cent respectivley.Solid brick wall=200mm thick. Cavity wall=brickd 2x100mm thick, with 50mm cavity.talk about surface resistance too.:rolleyes: :confused:
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    (Original post by sazzarooo)
    Looking for a bit of feedback for the following question:
    Compare the rate and flow of heat per unit area through a solid brick wall and that of a cavity wall, filled with insulating foam. Assume steady state conditions,parallel flow and that the outside and inside temperatures are 21 cent and 1 cent respectivley.Solid brick wall=200mm thick. Cavity wall=brickd 2x100mm thick, with 50mm cavity.talk about surface resistance too.:rolleyes: :confused:
    is this like thermal stuff?

    cos i know about steady state i think
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    (Original post by andyj72)
    is this like thermal stuff?

    cos i know about steady state i think
    yes-:confused:
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    its about energy going from a hot environment to a cold environment where the hot environment has a constant input of energy, steady state, but ive never had to do any calculationsfor that sort of stuff. what exam board are you on?
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    Is this a synoptic question, if it is i think i've done it.My teacher bought a book with loads of them in. If it is the same question everything is analogous to electrical equations, mainlyV=IR. The difference in temperature is like the potential difference, I think you are given a thermal resistance co-effcient for every material used, which is analogous to resistivity. Multiply this by the length of each material used, this gives resistance per unit area, then you can work out "I/A", where I represents heat flow.
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    is this edexcel???
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    Thankyou ever so much for your feedback. I had almost given up with anyone coming up with anything. James-your feedback is spot on and although it is knew to me I am beginning to get a grasp of it. Cheers.
    With only a week to go and my portfolio still incomplete-I am offski now to get on with the finishing touches.
    Thanks again! :tsr: :cool:
 
 
 
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