Low-carbon steel is known to have a slight but not negligible strain-rate sensitivity at room temperature. to determine the sensitivity, specimens of w = 12.68 mm width, h = 3.23 mm thickness, an l = 50 mm gage length were tested with a cross head speed of 6 mm/min until a load of 10660 n was reached. at this point speed was instantaneously increased tenfold to 60 mm/min and load increased to 11096 n. calculate (a) the strain rate sensitivity exponent and (b) strength constant.

Consider a power plant with water as the working fluid that operates on an ideal rankine cycle. it has a net power output of 45mw. superheated steam enters the turbine at 7mpa and 500°c (h=3411.4 kj/kg; s=6.8 kj/kg k) and is cooled in the condenser at a pressure of 10 kpa by running cooling water from a lake through the tubes of the condenser at a rate of 2000 kg/s. (a) show the cycle on a t-s diagram (a right schematic is fine - you do not need to calculate the temperatures at each point); (b)-determine the work done by the turbine and the pump in kj/kg; (c)-the mass flow rate of water used by the power plant; (d)-the thermal efficiency of the cycle; (e)-the temperature rise of the cooling water. assume the cooling water is incompressible with cp 4.18 kj/kg°c.