3.. A steel rod 2cm diameter passes through a tube 2.5cm in internal diameter and 3.5cm in external. 1 answer below »
3.. A steel rod 2cm diameter passes through a tube 2.5cm in internal diameter and 3.5cm in external diameter the tube is 80cm long and closed on both ends by rigid washers , . Find the stress developed when the assembly is tightened by a quarter turn .