5. A flight from Atlanta to Los Angeles takes 5 hours to travel a distance of 3,117 km. The flight back from Los Angeles to Atlanta is the same distance, but takes only 4 hours and 20 minutes. What does this indicate to
you about the direction of the wind that the plane encounters during these flights?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.