What will happen to the motion of the particles when we- a) Add heat to an object. b) Remove heat from an object.
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When heat is applied to an object , the particles begin vibrating to and fro their mean position.
and if the heat is removed or say the object is cooled, the vibration reduces and then stops.
This intermolecular vibration cannot be seen by our eyes.
metals expand due to this vibration . As the molecules vibrate , the molecules take up more space.
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