Acylinder 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

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

moisture is lackin, and organic acids are scarce.