Fluid Mechanics Quiz

When an object moves through a fluid, which of the following will affect fluid friction? Select all that apply.

• The fluid's color

• The fluid's viscosity

• The speed of the object

• The object's density

• The shape of the object

True or False. Water has greater viscosity than air.

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Briefly explain the difference between viscosity and fluid friction.

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Which of the following are factors that affect air density? Select all that apply.

• Humidity

• Pressure

• Viscosity

• Friction

• Temperature

Briefly explain why two substances with the same volume can have different densities. Give an example.

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True or False. Air density increases as altitude increases.

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Which of the following statements about air density are true? Select all that apply.

• Air density and air pressure are inversely proportional.

• As temperature increases, so too does density.

• Temperature is inversely related to air density.

• Humid air is less dense than dry air.

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NGSS.HS-PS3-2

The Coanda Effect is the tendency of a stream of fluid to _______ .

• avoid a moving object

• move below an airplane's wing

• attach to a convex surface

• go around a wing or rotor

Millibars (mb) is a unit of measurement for _______ .

• air temperature

• density

• atmospheric pressure

• fluid friction

An airfoil's movement through air is similar to _______.

• a moving freight train

• a boat's movement on water

• a beam of light

• electron flow through a wire

Tags

NGSS.HS-PS2-1