Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.70-cm-thick glass plate has an area of 20,000 cm?. Assuming the same temperature difference across each, what is the ratio of the rate of heat conduction through the plate with respect to the rate of heat conduction through the tabe top? Use Table 10.1 (given below) for the value of Thermal Conductivity k. Table 10.1 Thermet Conductivities of Common Substances Values cre gnen for tenperatures near O C. Substance Thermal Conductivity k (Wim O Damond 2000 Siver 420 Copper Gold 315 Aluminum 220 Steel iron 80 Steel (stainless) 14 kce 2.2 Glass (average) 0.84 Concvte trick Water 0.6 Fatty tiszue (without ticod) 0.2 Asbestos Placterboard 0.16 Wood 0.00-0.16 Snow (dry) a.10 Cork 0.042 Glass wool 0042 Wool 0.04 Down feathers 0025 Air 0023 Polystyrene foam a010

Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.70-cm-thick glass plate has an area of 20,000 cm?. Assuming the same temperature difference across each, what is the ratio of the rate of heat conduction through the plate with respect to the rate of heat conduction through the tabe top? Use Table 10.1 (given below) for the value of Thermal Conductivity k. Table 10.1 Thermet Conductivities of Common Substances Values cre gnen for tenperatures near O C. Substance Thermal Conductivity k (Wim O Damond 2000 Siver 420 Copper Gold 315 Aluminum 220 Steel iron 80 Steel (stainless) 14 kce 2.2 Glass (average) 0.84 Concvte trick Water 0.6 Fatty tiszue (without ticod) 0.2 Asbestos Placterboard 0.16 Wood 0.00-0.16 Snow (dry) a.10 Cork 0.042 Glass wool 0042 Wool 0.04 Down feathers 0025 Air 0023 Polystyrene foam a010

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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