6.The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight

7.The stress developed in a material at breaking point in extension is called

8.In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called

9.If a material expands freely due to heating it will develop

10.Flow stress corresponds to