Physics M4

Viscosity is:

• a property of fluids which characterizes the magnitude of the internal friction;

• a property of sound;

• a property of solids.

at the centerline of the tube:

• fluid velocity is minimum;

• fluid velocity is maximum;

• fluid velocity is constant.

The hydraulic resistance:

• is directly proportional to the coefficient of dynamic viscosity;

• is inversely proportional to the coefficient of dynamic viscosity;

• does not depend on the coefficient of dynamic viscosity.

The hydraulic resistance:

• is directly proportional to the tube length;

• is inversely proportional to the tube length;

• does not depend on the tube length.

The flow rate:

• is inversely proportional to the coefficient of dynamic viscosity;

• is directly proportional to the coefficient of dynamic viscosity;

• does not depend on the coefficient of dynamic viscosity.

The flow rate:

• is inversely proportional to the tube length;

• is directly proportional to the tube length;

• does not depend on the tube length.

The flow rate:

• is directly proportional to the pressure difference at both ends of the tube;

• is inversely proportional to the pressure difference at both ends of the tube;

• does not depend on the pressure difference at both ends of the tube,

A body moving in a viscous fluid:

• experiences a force opposite to the direction of its velocity;

• experiences a force in the same direction as its velocity;

• does not experience the influence of drag force.

The flow rate:

• is inversely proportional to the hydraulic resistance;

• is directly proportional to the hydraulic resistance;

• does not depend on the hydraulic resistance.

The drag force on a spherical body moving in a viscous fluid:

• is directly proportional to the coefficient of dynamic viscosity;

• is inversely proportional to the coefficient of dynamic viscosity;

• does not depend on the coefficient of dynamic viscosity.