Two copper rods and one aluminium rod of the same length are joined together to form an equilateral triangle ABC. A rod AD of another material connects the vertex A to the mid-point D of the base (aluminium) rod of the triangle. For small rise in temperature of the system there will be no tendency for the sides of the triangle to buckle. Determine the coefficient of linear expansion of the material of the rod AD. Given, alpha for copper =16 times 10^(-6@)C^(-1) " and " alpha for aluminium =26 times 10^(-6@)C^(-1).

Two copper rods and one aluminium rod of the same length are joined to

1.	Two copper rods and one aluminium rod of the same length are joined together to form an equilateral triangle ABC. A rod AD of another material connects the vertex A to the mid-point D of the base (aluminium) rod of the triangle. For small rise in temperature of the system there will be no tendency for the sides of the triangle to buckle. Determine the coefficient of linear expansion of the material of the rod AD. Given, alpha for copper =16 times 10^(-6@)C^(-1) " and " alpha for aluminium =26 times 10^(-6@)C^(-1).
Answer» ANSWER :`12.7 TIMES 10^(-6@)C^(-1)`