If the cycle develops net work at a rate of 85.5 kJ per kg of carbon dioxide flowing through the turbine, determine the thermal efficiency, back work ratio, isentropic efficiency of each compressor stage, and isentropic turbine efficiency.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.