101208 - Phys 121 12/8/10 12/8/10 Physics 121 1 12/8/10...

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Phys 121 12/8/10 Prof. E. F. Redish 1 12/8/10 1 Physics 121 12/8/10 2 Physics 121 12/8/10 4 Physics 121
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Phys 121 12/8/10 Prof. E. F. Redish 2 12/8/10 5 Physics 121 12/8/10 6 Physics 121 ± T = Z ² Z = ± L A 12/8/10 7 Physics 121 = ² A k = 1 ³ ± T = Z ² = L A ² = L k ´ µ · ² A ´ µ · ± T = R ¸ Thermal conductance Heat flow per unit area Thermal resistance (R-value)
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Phys 121 12/8/10 Prof. E. F. Redish 3 12/8/10 8 Physics 121 Material k (W/m-C) Material k (W/m-C) Steel 12-45 Wood 0.4 Aluminum 200 Insulation 0.04 Copper 380 Air 0.025 12/8/10 9 Physics 121 12/8/10 10 Physics 121
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Phys 121 12/8/10 Prof. E. F. Redish 4 12/8/10 11 Physics 121 12/8/10 12 Physics 121 12/8/10 13 Physics 121
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Phys 121 12/8/10 Prof. E. F. Redish 5 12/8/10 14 Physics 121 Average force of gas on the wall = (# of molecules hitting the wall in the time ± t) x (force each molecule exerts on the wall) F wall ± molecule = m ² v x ² t = ³ F molecule ± wall Only the x -component matters. All we need to figure this out is our three basic equations, and a way to count
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This note was uploaded on 12/28/2011 for the course PHYSICS 121 taught by Professor Shawhan during the Spring '10 term at Maryland.

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101208 - Phys 121 12/8/10 12/8/10 Physics 121 1 12/8/10...

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