Three rods of equal length l are joined to form an equilateral triangle PQR. O is the mid point of PQ. Distance OR remains the same for small change in temperature. Coefficient of

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Three rods of equal length l are joined to form an equilateral triangle PQR. O is the mid point of PQ. Distance OR remains the same for small change in temperature. Coefficient of
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Oct
Three rods of equal length l are joined to form an equilateral triangle PQR. O is the mid point of PQ. Distance OR remains the same for small change in temperature. Coefficient of Three rods of equal length l are joined to form an equilateral triangle PQR. O is the mid point of PQ. Distance [...]
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