Tnt cable channel began using the slogan "tnt knows drama" in early 2002. it wants to determine how its viewership has changed since it has changed its programming focus. it has decided to use secondary data to determine if its viewers' demographics have changed. a potential disadvantage of this research plan is:

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?