A cylinder 8 in in diameter and 3 ft long is concentric with a pipe of 8.25 in internal diameter. Between the cylinder and the pipe there is an oil film. What force is required to move the cylinder along the pipe at a constant velocity of 3 ft/s? The kinematic viscosity of the oil is 0.006 ft2 /s; the SG is 0.92.

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more