A 12-in. length of aluminum tubing (with properties of E = 10.4 x 106 psi and α = 12 x 10-6 per degree Fahrenheit) having a cross-sectional area of 1.5 in.2 is installed with "fixed" ends so that it is stress-free at 60°F. In operation, the tube is heated throughout to a uniform 260°F. Careful measurements indicate that the fixed ends separate by .008 in. What loads are exerted on the ends of the tube, and what are the resultant stresses?