In physics and chemistry, heat is energy transferred from one body to another by thermal interactions. The transfer of energy can occur in a variety of ways, among them conduction, radiation, and convection. Heat is not a property of a system or body, but instead is always associated with a process of some kind, and is synonymous with heat flow and heat transfer.
Read more about Heat.
Some articles on heat:
... The carotid rete is a counter-current heat exchanging organ in some ungulates ... to the brain, flows via a network of vessels where heat is discharged to the veins of cooler blood descending from the nasal passages ... cooler than the rest of the body, and therefore aids in tolerating bursts in metabolic heat production such as associated with outrunning cheetahs (during which the body ...
... A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another ... The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the ...
... ore (smelting) or in oil refineries and other chemical plants, for example as the heat source for fractional distillation columns ... fired heater, used in boiler applications in chemical industries or for providing heat to chemical reactions for processes like cracking, and is part of ... The heat energy to fuel a furnace may be supplied directly by fuel combustion, by electricity such as the electric arc furnace, or through induction heating in ...
... in biological systems "Countercurrent" heat exchangers occur naturally in the circulation system of fish, whales and other marine mammals ... the skin carrying cold blood, causing the warm arterial blood to exchange heat with the cold venous blood ... This reduces the overall heat loss in cold waters ...
... Heat exchangers are widely used in industry both for cooling and heating large scale industrial processes ... The type and size of heat exchanger used can be tailored to suit a process depending on the type of fluid, its phase, temperature, density, viscosity, pressures, chemical composition and various other ... In many industrial processes there is waste of energy or a heat stream that is being exhausted, heat exchangers can be used to recover this heat and put it to use by heating a different ...
More definitions of "heat":
- (noun): A form of energy that is transferred by a difference in temperature.
Synonyms: heat energy
- (verb): Make hot or hotter.
Example: "Heat the soup"
Synonyms: heat up
- (noun): A preliminary race in which the winner advances to a more important race.
- (noun): Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity.
Synonyms: estrus, oestrus, rut
- (verb): Provide with heat.
Example: "Heat the house"
- (noun): The sensation caused by heat energy.
Famous quotes containing the word heat:
“For it is wretchedness that endures, shedding its cancerous light on all it approaches:
Words spoken in the heat of passion, that might have been retracted in good time,
All good intentions, all that was arguable.”
—John Ashbery (b. 1927)
“When the heat of the summer
Made drowsy the land,
A dragon-fly came
And sat on my hand;”
—Eleanor Farjeon (18811965)
“Friendship is evanescent in every mans experience, and remembered like heat lightning in past summers.”
—Henry David Thoreau (18171862)