lymer is initially exposed to 13.8 MPa of axial tension at room temperature. If the polymer features a relaxation time of 26.2 hr at room temperature, how long will it take for the tensile stress in the polymer to reach 10.3 MPa

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

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?