I have a 730 mm thick concrete brick table top with an area of 10,000,000 mm^2 and a 0.750 cm thick glass plate with an area of 20,000 cm^2. 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 table top? Refer to the table given for the value of Thermal Conductivity k.
I have a 730 mm thick concrete brick table top with an area of 10,000,000 mm^2 and a 0.750 cm thick glass plate with an area of 20,000 cm^2. 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 table top? Refer to the table given for the value of Thermal Conductivity k.
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I have a 730 mm thick concrete brick table top with an area of 10,000,000 mm^2 and a 0.750 cm thick glass plate with an area of 20,000 cm^2. 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 table top? Refer to the table given for the value of Thermal Conductivity k.
Transcribed Image Text:Substance
Thermal Conductivity k (W/m · °C)
Diamond
2000
Silver
420
Copper
390
Gold
318
Aluminum
220
Steel iron
80
Steel (stainless)
14
Ice
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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