A Newtonian fluid is one which

A.is frictionless and incompressible
B.has a linear relationship between the magnitude of applied shear stress and the resulting rate of deformation
C.has a nonlinear relationship between the magnitude of spplied shear stress and the resulting rate of deformation
D.has a vapor pressure of 1 N/m2 at 25?C.

Steady flow occurs

A.when the velocity at a given point changes steadily with time
B.when the velocity at a given point does not change with time
C.when the velocity does not change with respect to space
D.when the velocity be changed