Suppose a cold can of coca-cola is sitting on a flat table. the can has a flat circular bottom of area 100 cm2 and the can is coated with a very thin layer (0.01 mm) of condensation (which is why you don't set you coke on an expensive wooden table). how much force must you exert horizontally to move the can with a constant velocity of 1 cm/sec?

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