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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.
Physical changes . Why we call them physical changes? A reversible change might change how a substance looks or feels (Changing the physical appearance), and it is easy to turn it back again. But it doesnât produce new substances. E.g. â Water can change into ice. Ice can change into water. Here only the state of the substance (liquid water) changes, but not the substance (water). Examples of reversible changes . Melting. Example (1) â When chocolate is warmed until it melts, the melted chocolate can be changed back into solid chocolate by cooling. Example (2) -When candle wax is heated, the solid wax melts and becomes a liquid.