1. The weight of a moist (unsaturated) sample of soil is 13.35 lbf and its volume is 0.114 ft3. After drying the sample in the oven, its weight is 11.95 lbf. If the specific gravity of solids is 2.71, find (a) total unit weight (pcf), (b) dry unit weight (pcf), (c) void ratio, (d) porosity, (e) water content, and (f) degree of saturation. (Partial e

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

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

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