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Hi everyone, hemorrhoid also known as piles is very much painful and this is caused when tissues gets enlarge, or it becomes weak etc. The tissues gets swollen that contain veins and forms hemorrhoid. This is very much critical situation as the pain is not bearable and it should be cured as soon as possible.
The freon in air conditioners (home or car) and refrigerators changes from gas to a liquid and back to a gas, which then repeats. This is a physical change because the freon does not change its chemical makeup, just its state (liquid versus gas). A physical change is easily reversible.atching sugar burn allow you to witness hundreds of types of chemical reactions in a matter of seconds. The physical change you noticed is when the sugar reached its melting point (which is a physical property). Then the color change indicates a chemical reaction.