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PROBLEM: Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.750-cm-thick glass plate that has an area of 20,000 cm2. 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 Thermal Conductivities of Common Substances Values are given for temperatures near 0 °C. Substance Thermal Conductivity k (W/m- °C) Diamond 2000 Silver 420 Copper 390 Gold 318 Aluminum 220 Steel iron 80 Steel (stainless) 14 lce 2.2 Glass (average) 0.84 Concrete brick 0.84 Water 0.6 Fatty tissue (without blood) 0.2 Asbestos 0.16 Plasterboard 0.16 Wood 0.08-0.16 Snow (dry) 0.10 Cork 0.042 Glass wool 0.042 Wool 0.04 Down feathers 0.025 Air 0.023 Polystyrene foam 0.010

PROBLEM: Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.750-cm-thick glass plate that has an area of 20,000 cm2. 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 Thermal Conductivities of Common Substances Values are given for temperatures near 0 °C. Substance Thermal Conductivity k (W/m- °C) Diamond 2000 Silver 420 Copper 390 Gold 318 Aluminum 220 Steel iron 80 Steel (stainless) 14 lce 2.2 Glass (average) 0.84 Concrete brick 0.84 Water 0.6 Fatty tissue (without blood) 0.2 Asbestos 0.16 Plasterboard 0.16 Wood 0.08-0.16 Snow (dry) 0.10 Cork 0.042 Glass wool 0.042 Wool 0.04 Down feathers 0.025 Air 0.023 Polystyrene foam 0.010

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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PROBLEM: Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.750-cm-thick glass plate that has an area of 20,000 cm2. 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 Thermal Conductivities of Common Substances Values are given for temperatures near 0 °C. Substance Thermal Conductivity k (W/m-°C) Diamond 2000 Silver 420 Copper 390 Gold 318 Aluminum 220 Steel iron 80 Steel (stainless) 14 lce 2.2 Glass (average) 0.84 Concrete brick 0.84 Water 0.6 Fatty tissue (without blood) 0.2 Asbestos 0.16 Plasterboard 0.16 Wood 0.08-0.16 Snow (dry) 0.10 Cork 0.042 Glass wool 0.042 Wool 0.04 Down feathers 0.025 Air 0.023 Polystyrene foam 0.010
Transcribed Image Text:PROBLEM: Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm? and a 0.750-cm-thick glass plate that has an area of 20,000 cm2. 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 Thermal Conductivities of Common Substances Values are given for temperatures near 0 °C. Substance Thermal Conductivity k (W/m-°C) Diamond 2000 Silver 420 Copper 390 Gold 318 Aluminum 220 Steel iron 80 Steel (stainless) 14 lce 2.2 Glass (average) 0.84 Concrete brick 0.84 Water 0.6 Fatty tissue (without blood) 0.2 Asbestos 0.16 Plasterboard 0.16 Wood 0.08-0.16 Snow (dry) 0.10 Cork 0.042 Glass wool 0.042 Wool 0.04 Down feathers 0.025 Air 0.023 Polystyrene foam 0.010
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