UV Index Resources. 1  Download the free UV Index smartphone app. 2  Stay up to date with our UV Index applications. 3  UV Alert map Exit- Areas in the U.S. where the UV Index is forecasted to be above normal. 4  Cities forecast bulletin Exit- A plain text listing of forecasted UV Index values for 58 U.S. cities.
High electrical conductivity refers to the ability of certain materials to conduct a large amount of electrical current. Electrical conductivity is abbreviated by the Greek letters sigma (Ï) or kappa (Îº). The SI unit of electrical conductivity is Siemens per meter (S/m).
Thermal conductivity of gases, insulation products, aluminum, asphalt, brass, copper, steel and other common materials. Thermal conductivity is a material property describing the ability to conduct heat. Thermal conductivity can be defined as. the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state conditions.