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Classify the insulting material on the basis of their density |
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Answer» The physical classification of insulating material is classified into three types they are solid, liquid, and gaseous.5.3 Thermal insulation materialsType Density (kg/m3) Thermal conductivity (W m-1 °C-1) / (kcal h-1 m-1 °C-1)Foam 30 0.026/0.0224Rigid expanded board 30 0.02-0.025/0.0172-0.0215 average: 0.0225/0.0193Rigid expanded board 40 0.023/0.02Rigid expanded board 80 0.04/0.34The ABILITY of a thermal insulation material to transmit heat in the PRESENCE of a temperature gradient is determined by its thermal conductivity. ... The results show that HIGHER temperatures lead to higher thermal CONDUCTIVITIES and the lower is the material density, the higher is the thermal conductivity.Explanation:I hope this helps you |
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