Fluids Pressure and Buoyant Force

When a fluid fills a closed container, it exerts pressure

• only on the bottom of the container

• only on the sides of the container

• only on particles within the fluid

• everywhere inside the container

Fluids exert pressure because they

• contain force particles

• are confined to small area

• have constantly moving particles

• all of these are correct

The SI unit for pressure is named for the scientist who discovered that pressure is

• transmitted equally throughout an enclosed fluid

• greater on Mount Everest than at sea level

• transmitted only from gases to liquids

• greater in a faster moving fluid

To find the pressure exerted by a force on a given area, you should

• multiply the force by the area

• divide the force by the area

• add the force to the area

• subtract the force from the area

Ice floats on water because water has greater

• mass

• density

• volume

• movement

The ability of a fluid to exert upward force on objects placed in the fluid is known as

• weight

• floating

• buoyancy

• mass

The buoyant force acting on an object in a fluid equals the

• weight of the object

• force of gravity pulling down on the object

• weight of the fluid displaced by the object

• none of these

Why can you fill a balloon with air by blowing air into it through a single small opening?

• Particles of a fluid always spread out to fill their container

• Pressure of a fluid is greater when the same force is applied to a larger area

• Particles of a fluid always move from an area of lower pressure to an area of higher pressure

• Particles of a fluid only move in a single direction

Tags

NGSS.MS-PS1-4

Assume that you apply 10 Pa of pressure to the head of a thumbtack. How much pressure will the point of the tack apply to a corkboard?

• 0 Pa

• less than 10 Pa

• exactly 10 Pa

• more than 10 Pa

Which of the following is the SI unit for pressure?

• N or Pa

• N/m or Pa

• N/m² or Pa

• none of these