Business / Construction / Conductivity: The rate at which heat is transmitted through a material.

Electrical Conductivity

Science / Chemistry / Electrical Conductivity: A measure of how easily an electric current can pass through a material. The conductivity is the reciprocal of the resistance. The SI unit of conductance is the siemens. MORE


Science / Chemistry / Superconductivity: The ability of certain materials to carry an electric current with zero electrical resistance. MORE

Hydraulic Conductivity

Science / Geology / Hydraulic Conductivity: A measure of the permeability of a rock or soil: the volume of flow through a unit surface in unit time with unit hydraulic pressure difference as the driving force. MORE

Thermal Conductivity

Science / Geology / Thermal Conductivity: A measure of a rock's capacity for heat conduction. MORE

Helium (He)

Science / Periodic Table of Elements / Helium (He): Atomic number: 2, Atomic mass: 4.00260 g.mol -1, Electronegativity: unknown, Density: 0.178*10 -3 -3 at 20 °C, Melting point: - 272.2 (26 atm) °C, Boiling point: - 268.9 °C, Vanderwaals radius MORE

Silver (Ag)

Science / Periodic Table of Elements / Silver (Ag): Atomic number: 47, Atomic mass: 107.87 g.mol -1, Electronegativity: 1.9, Density: 10.5 at 20°C, Melting point: 962 °C, Boiling point: 2212 °C, Vanderwaals radius: 0.144 nm, Ionic radius: 0.1 MORE