Tests are performed to determine the Tool Life of a high-speed steel single-edge cutting tool. At cutting speeds (v) of 180 m/min and 110 m/min the corresponding tool life is 4.25 min and 35 min., respectively. Except for the cutting speed, the cutting conditions in both tests are the same. Calculate the value of n in the Taylor Tool Life Equation. Answers are rounded to three (3) decimal places (x. xxx).

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?