Which formula describes Boyle's law? A.
PV = constant, where P= pressure, V= volume
B.
V/T = constant, where V= volume, T = time
C.
PT = constant, where P= pressure, T = time
D.
P/V = constant, where P= pressure, V= volume
E.
VT = constant, where V= volume, T = time

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?