Heat: A form of energy transferred between two systems by virtue of a difference in temperature. The first law of thermodynamics demonstrated that the heat absorbed by a system may be used by the system to do work or to raise its internal energy.

 

Related Words

Heat: A form of energy transferred between two systems by virtue of a difference in temperature. The first law of thermodynamics demonstrated that the heat absorbed by a system may be used by the . . . View Full Definition

Heat Stroke: Introduced to the body by overexposure to high temperatures, particularly when accompanied by high humidity. The signs of heat stroke include when an individual's body temperature is greater . . . View Full Definition

Heat Exhaustion: The effect of excessive heat, particularly when combined with high humidity, on a human being. Signs of heat exhaustion include a general weakness, heavy sweating and clammy skin, dizziness . . . View Full Definition

Heat Wave: A period of abnormally and uncomfortably hot weather. It could last from several days to several weeks. The Weather Channel uses the following criteria for a heat wave: a minimum of ten stat . . . View Full Definition

Heating Degree Day: One heating degree day is given for each degree that the daily mean temperature is below 65°F. It is used as an indication of fuel consumption.

Heat Engine: A device that transfers heat from a place of high temperature to a place of lower temperature and does mechanical work in the process.

Heat Conduction: The transfer of the rapid vibrational energy of atoms and molecules, which constitutes heat energy, through the mechanism of atomic or molecular impact.

Heat Balance: The equilibrium which exists on the average between the radiation received by the earth and atmosphere from the sun and that emitted by the earth and atmosphere. The balance between heat los . . . View Full Definition

Heat Flow: The movement of heat energy from the core of the Earth towards the surface.

Heathland: Open uncultivated land (particularly in the british isles) having sandy soil and dominated by small shrubs with small hard leaves (e.g., heather)