Help 1 state five fact about the earth
2 list seven variety roles of satellites
3 state 3 criteria that make pluto different from other planets
4 full meaning of IAU
5 list the type of contact force
6 what is force

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.