Heat+Energy

=Heat=

Heat energy always flows from hot to cold, so if two objects of different temperatures touch each other, then heat will flow from the hotter to the colder until they are at the same temperature, when the heat flow stops.Since heat energy is form of of energy it is measures in Joules (J).Heat ia the measure of the total energy of a material.

these are the three different ways heat transfers: -Convection -Conduction -Radiation

a good example of all three heat energy transfers is, a cup with hot liquid inside it.
 * When the cup is touched and the warmth can be felt it is conduction. hot liquid vibrates the paticles in the cup and it conducts into your hand.
 * If you put your hand near the cup, but not touching it is warm. this is radiation heat energy, reaching your hand from the hot liquid through the spaces in the air.
 * If you put your hand above the cup, it will be hot. this is convection - the hot air from the liquid is rising.h[[image:C,C,R.jpg]]