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Saturday, February 7, 2015
What is heating and cooling?
Touch something hot and your senses immediately tell you to pull your hand away. hotness is about the amount of heat energy an object has.
a spark from a firework may be very hot but it will not hurt very much becuse it does not contain much heat energy/however,even though a cup of tea may not be very hot,it can still burn the tongue because it contains a lot of heat energy