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

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3