St. Xavier's School, Rohini, Delhi
a plate made of steel has a hole in its center. if the whole system is heated, why the perimeter of the central hole will be increased ?
three metallic rods of same component are taken as those make a scalene triangle. If the total system is heated up to a specific temperature, what will be the next condition of the system ? will it be a similar triangle later ? If so, proof it mathematically.
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