Forces in Fluids- Chapter 3

The air above an airplane wing is moving faster than the air below an airplane wing. This causes the plane to______

• accelerate

• slow down

• increase its elevation

• decrease its elevation

If you blow a stream of air between two balloons that are next to each other, the balloons _______

• rise

• move away

• move toward each other

• move randomly

An object that is under water feels lighter than it does in air because of ________________

• air pressure

• buoyancy

• fluid speed

• temperature

When pressure is applied to a confined liquid, the increase in pressure is transmitted equally to all parts of the liquid. This fact is called ______

• Pascal's Principle

• Newton's Principle

• Archimede's Principle

• Bernoulli's principle

As the speed of a moving fluid increases, the pressure within the fluid decreases. This is called_____

• Bernoulli's Principle

• Pascal's Principle

• Newton's first law

• Archimedes principle

Pressure is

• force x area

• area divided by force

• Force + area

• force divided by area

Bubbles rise in water because they are ______

• so tiny

• less dense than water

• more dense than water

Fluids exert pressure because they are made up of tiny

• moving molecules that exert force

• forces that sum together

• molecules that push upward

True or False: The pressure exerted by gas in the Earth's atmosphere is called atmospheric pressure or air pressure

• True

• False

A force pump, such as your heart, works because of PAscal's principle.

• True

• False