take iron nail, rub it on a rough stone surface. what do you observe? the nail becomes hot because of friction.it is for the same reason that palns get warm when rubbed against each other. the jar of mixer,grinder gets hot when run for a few minutes.IN fact all moving parts of the machines get hot because of friction, Justify your answer by explanation by friction produces heat
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Explanation:
2y2 + 27y + 13 = 0 by completing square method
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