A two-bed carbon adsorption system is to be designed to handle 10,000 acfm of air containing 550 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lbm hexane per 100 lbm carbon under the conditions at which the system will be operated. If the system operates at 90oF and 1.0 atm at a removal efficiency of 96%, determine the approximate dimension of each carbon bed. Bed regeneration and cooling will require one hour.

Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2