Lippincott NursingCenter is a leader in providing clinical and professional peer-reviewed content to nurses and can help you meet your goals, whether youâre a new nurse starting out, or a seasoned nurse looking to stay up-to-date on the latest information.
Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
In SI units, thermal conductivity is measured in watts per meter kelvin (W /(m Â· K)). The dimension of thermal conductivity is M 1 L 1 T â3 Î¸ â1. These variables are (M)mass, (L)length, (T)time, and (Î¸)temperature. In Imperial units, thermal conductivity is measured in BTU /(hr Â· ft â Â°F).he reciprocal of thermal conductivity is thermal resistivity, usually expressed in kelvin-meters per watt (KÂ·mÂ·W â1). For a given thickness of a material, that particular construction's thermal resistance and the reciprocal property, thermal conductance, can be calculated.