What is heat ? What are the physical changes that are observed when an object is heated ?
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heat is a form of energy which flows from hot body to a cold body until the temperature has become equal.
when the objects r heated the expand like iron
when the objects r heated the expand like iron
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heat is the form of energy - it is transferred from one object to another (system to another ) due to a difference in temperature of the two systems.
its temperature changes
it expands in size in all directions.
it may change color.
the object gains energy and stores in it.
its temperature changes
it expands in size in all directions.
it may change color.
the object gains energy and stores in it.
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