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Tuesday, 6 July 2010

What is Temperature?

Temperature can be defined as the amount of hotness or coldness of a body or environment.

It can, however, be more accurately described as molecular motion and energy flow, and can be measure in a number of ways ie. the expansion of a liquid as seen in liquid in glass thermometers, or the change in resistance of a material such as copper or platinum.

Cropico are world leaders in accurate temperature measurement.

Heat


Heat is internal energy that flows from a system at a higher temperature to a system at a lower temperature. Two bodies at the same temperature are said to be in thermal equilibrium.

If a body at a higher temperature comes into contact with a body at lower temperature, heat will flow from the higher temperature to the lower one. If an ice cube is placed in a warm drink the heat from the drink will flow into the ice cube and melt it. The ice cube does not transfer its coldness to the drink, but of course the overall effect is for the drink to become slightly cooler.

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