Fluid Pressure and Gravity

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

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

Which of the following is the SI unit for pressure?

• N or Pa

• N/m or Pa

• N/m² or Pa

• none of these

If you know how much pressure is applied to a given area, you can calculate the force exerted on the area by

• multiplying pressure by area

• subtracting pressure from area

• dividing pressure by area

• adding pressure to area

If an object sinks in a fluid, _____.

• the density of the fluid is greater than the density of the object
• the density of the fluid is less than the density of the object
• the density of the fluid is equal to the density of the object
• density has nothing to do with whether an object sinks or floats, only which state of matter the object is

Water pressure increases as depth increases. 

• True
• False

Samantha spots buried treasure while scuba diving on her Caribbean vacation. If she must descend to a depth of 40 meters to examine the pressure, what gauge pressure will she read on her scuba equipment? The density of sea water is 1025 kg/m³.

• 40,200 Pa
• 4,020 Pa
• 3500 Pa
• 402,000 Pa

Samantha spots buried treasure while scuba diving on her Caribbean vacation. If she must descend to a depth of 40 meters what is her absolute pressure (air pressure 100,000 Pa)? The density of sea water is 1025 kg/m³.

• 502,000 Pa
• 402,000 Pa
• 602,000 Pa
• 422,000 Pa