10. Permanent set is a) the force which acts permanently on the body
b) irrecoverable deformation in the body
c) the shape of the member just after completion of
construction
d) ratio of poisson's ratio to young's modulus​

Water at the rate of 1 kg/s is forced through a tube with a 2.5 cm inner diameter. the inlet water temperature is 15°c, and the outlet water temperature is 50°c. the tube wall temperature is 14°c higher than the local water temperature all along the length of the tube. what is the length of the tube?