(a)describe the two methods of governing of steam turbines briefly. (b) write a short note on a wind mill. (c)-steam enters a simple impulse turbine at 1000 m/s and the nozzle angle is 20°. the mean speripheral velocity of blade is 400 m/s blade are symmetrical. neglecting frictional effects and on blade calculate the tangential & axial thrust, diagram power and efficiency

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers