Mix and Flow Topic 7-8

How do particles in a liquid respond when force is applied?

• They move closer together

• They move further apart

• They stay in place

• They change shape

Match the following actions with their effects on a soccer ball when kicked.

• Puncturing the ball

• It expands

• Pumping air into the ball

• It deflates

• Heating the ball

• It inflates

• Kicking the ball

• It compresses

What happens to particles in a gas when compressed?

• They expand

• They contract

• They dissolve

• They evaporate

In the formula for pressure, what does 'A' stand for?

• Acceleration

• Area

• Amplitude

• Angle

In the formula for pressure, what does 'F' stand for?

• Force

• Frequency

• Friction

• Flow

Which of the following statements is true about force?

• Force is measured in Pascals

• Force is the same as pressure

• Force is measured in Newtons

• Force is the area over which pressure is applied

The formula for calculating pressure is (a)  

• Pressure = Force x Area
• Pressure = Force / Area
• Pressure = Area / Force
• Pressure = Force + Area

What happens to a balloon as it rises and the external pressure decreases?

• It shrinks

• It expands

• It stays the same

• It deflates

What is a hydraulic system?

• A system that uses air to move objects.

• A system that uses water to generate electricity.

• A system that uses fluids to transmit force.

• A system that uses solids to transmit force.

The term that means "release from pressure" is (a)  

• Hydraulics
• Decompress
• Incompressibility
• Pneumatics