Determining the problem that you want to solve involves all of the following except
A) Identifying the right problem
B) Starting experiments before research
C) Observing how people in the field are identifying problems
D) have productive discussions and debates about the problem

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?