Three rods of equal length joined to from to from an equilateral triangle ABC. D is the midpoint of

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Three rods of equal length joined to from to from an equilateral triangle ABC. D is the midpoint of AB. The coefficient, of linear expansion is α₁ for AB and α₂ for AC and BC. If the distance DC remains constant for small charges in temperature : -

Accepted Answer

DC2 = L22 - &#8658; 0 = 2L2&#5123;L2 - &#8658; 0 = 2L2 (&#952;2L2&#952;) - &#8658; &#945;1 = 4&#945;2

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