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Question

Hi sir
I recently tied Holy thread from the temple I have one doubt in that.....
that is if I put my hand in water that thread stretches my hand
when my hand is in dry condition the thread losses and appears like long why this is happen please tell me.....

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Solution

well, according to hookes law: strain in a solid is proportional to the applied stress within the elastic limit of that soid or material. according to your question Therubber bandactually expands when it gets colder! This seems counterintuitive because most materials expand when they are heated and contract when they get cold. This occurs because of the unusual polymer structure of rubber. whereas holy thread is normal material which contracts on being cold and expands while hot considering temperature of water to be ooler than room temperature

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