Origin of conduction
Examples from the Web for conduction
Far more interesting are the results obtained by the study of gases in their relation to the conduction of electricity.A History of Science, Volume 5(of 5)|Henry Smith Williams
The third loss is by conduction and radiation, which amounts to fifteen per cent.Motors|James Slough Zerbe
The escape of heat from a cooling mass is effected by conduction, or by convection, or by both.Essays: Scientific, Political, & Speculative, Vol. I|Herbert Spencer
In a transparent dielectric the conduction must be either electrolytic or disruptive, otherwise light vibrations would be damped.
It explains the conduction of heat through solid bodies in the same manner.Curiosities of Heat|Lyman B. Tefft
British Dictionary definitions for conduction
Word Origin and History for conduction
1530s, "hiring;" 1540s, "leading, guidance," from Old French conduction "hire, renting," from Latin conductionem (nominative conductio), noun of action from past participle stem of conducere (see conduce). Sense of "conducting of a liquid through a channel" is from 1610s; in physics, of heat, etc., from 1814.
Medicine definitions for conduction
Science definitions for conduction
A Closer Look
Heat is a form of energy that manifests itself in the motion of molecules and atoms, as well as subatomic particles. Heat energy can be transferred by conduction, convection, or radiation. In conduction heat spreads through a substance when faster atoms and molecules collide with neighboring slower ones, transferring some of their kinetic energy to them. This is how the handle of a teaspoon sticking out of a cup of hot tea eventually gets hot, though it is not in direct contact with the hot liquid. When a fluid is heated, portions of the fluid near the source of the heat tend to become less dense and expand outward, causing currents in the fluid. When these less dense regions rise, cooler portions flow in to take their place, which are then themselves subject to heating. This current flow is called convection. Many ocean currents are convection currents caused by the uneven heating of the ocean waters by the Sun. Radiation transmits heat in the form of electromagnetic waves, especially infrared waves, which have a lower frequency than visible light but a higher frequency than microwaves. Atoms and molecules in a substance struck by such radiation readily absorb the energy from these waves, thereby increasing their own kinetic energy and thus the temperature of the substance.