Viscosity

Viscosity can be described as...

• a physical property of liquids

• a physical property of solids

• a chemical property of liquids

Which of the following liquids is viscous?

• honey

• water

• soy sauce

• cooking oil

As temperature increases viscosity _______________.

• increases

• stays the same

• decreases

What is Drag Force?

• The force that propels an object forward.

• The force that opposes the motion of an object through a fluid (liquid or gas).

• The force that keeps an object floating on water.

• The force that causes an object to sink in a fluid.

What is the relationship between the drag force and the velocity of an object moving through a fluid?

• Directly proportional

• Inversely proportional

• Unrelated

• Exponential

What is terminal velocity of a object falling through air?

• Terminal velocity refers to an object falling at a constant acceleration after the force of gravity is greater to the air resistance.

• Terminal velocity refers to an object falling at a constant velocity after the force of gravity is equal to the air resistance.

• Terminal velocity refers to an object falling at a constant acceleration after the force of gravity is equal to the air resistance.

• Terminal velocity refers to an object falling at a constant acceleration after the force of gravity is equal to the viscosity.

What is the Formula for Stokes' Law

• F = 6πη/rv

• F = 4/3 πηrv

• F = 6πηrv

• F = 6πηr^2v^2

What condition must be met for terminal velocity to be reached ?

• W = U / F

• W = U x F

• W = U - F

• W = U + F

Viscosity is realted to a fluids:

• External friction

• Internal friction

Poiseuille law is used to calculate:

• the speed of laminar flow

• the volume flow rate or pressure drop of a viscous fluid flowing through the tube or pipe.

• the speed of turbulent flow

• he force required to move a sphere through a given viscous fluid at a low uniform velocity