Given the complex numbers: a1 = 6∠30° and a2 = 4 + j5 a. convert a1 to rectangular form. b. convert a2 to polar and exponential form.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.