A steel railroad track has a length of 30.000 m when the temperature is 0.0∘∘C.Suppose that the ends of the rail are rigidly clamped at 0.0∘∘C so that expansion is prevented. What is the thermal stress set up in the rail if its temperature is raised to 40.0∘∘C? α−steel=11×10−6α−steel=11×10−6 (∘∘C)-1 Y-steel =20GPa
A 0.050 0-kg ingot of metal is heated to 200.0∘∘C and then dropped into a beaker containing 0.400 kg of water initially at 20.0∘∘C. If the final equilibrium temperature of the mixed system is 22.4∘∘C, find the specific heat of the metal.