Most Physcial changes are reversible. Give reasons with two examples
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1.tearing a paper is a physical change as the shape and dimensions of paper would be changing but the paper would remain paper and its chemistry wouldnt be changed. constituent chemical properties of paper wouldnt be changed making it a reversible process
2. lighting a bulb . when a bulb is lit. electricity flow through the filament having high resistance and high melting point as a result of which when it reaches high temp it starts glowing but if you turn off the switch the filament cools down and bulb doesnt emit light making this a reversible process also the inner constituent properties of the material aren't changing
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