The force required to maintain a relative velocity of 1cm/sec between two parallel planes placed 1 cm apart is called ________$

The force required to maintain a relative velocity of 1cm/sec between

1.	The force required to maintain a relative velocity of 1cm/sec between two parallel planes placed 1 cm apart is called ________$
A.	acceleration
B.	buoyancy force
C.	viscosity
D.	flow
Answer» B. buoyancy force