Chapter 11: Forces in Fluids

Which of the following is not the Si unit of pressure?

• N/m²
• Pa
• newton
• pascal

Pressure is

• force x area
• area/force
• force + area
• force/area

At higher elevations, air pressure is 

• less because there is less air above
• greater because there is more air below
• less because gravity is stronger
• less because the air is moving faster

When pressure is applied to a confined fluid, the increase in pressure is transmitted equally to all parts of the fluid.

• Pascal's principle
• Newton's principle
• Archimedes' principle
• Bernoulli's principle

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

• air pressure
• buoyancy
• fluid speed
• temperature

An object is dropped into a beaker containing a liquid, The object drops to the bottom of the beaker. Therefore, the

• density of the object is greater than the density of the liquid

• density of the object is less than the density of the liquid

• mass of the object is less than the mass of the liquid

• volume of the liquid displaced is more than the volume of the object

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

• rise
• move away from each other
• move toward each other
• move randomly

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Air above an airplane wing is moving faster than air below an airplane wing. This causes the plane to  

• accelerate
• slow down
• increase its elevation
• decrease its elevation

Fluids exert pressure because they are made up of tiny

• moving molecules that exert forces
• forces that sum together
• molecules that push upward
• particles that are buoyant

Bubbles rise in water because they are

• so tiny
• less dense than water
• more dense than water
• fluids