Agrade beam ab supports three concentrated loads and rests onsoil
and the top of a large rock. the soil exerts an upwarddistributed
load, and the rock exerts a concentrated
loadrr as shown. knowing that p = 1 kip
andwb = 1/2 wa, determine the values
ofwa and rr corresponding to equilibrium.

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