Fluids

The force exerted per unit area is known as

• pressure
• viscosity
• buoyancy

The ability of a fluid to exert an upward force on an object is known as

• pressure
• viscosity
• buoyancy

States that the buoyant force of an object is equal to the weight of the fluid displaced by the water.  This explains why big ships float. 

• Archimedes' Principle
• Bernoulli's Principle
• Pascal's Principle

States that as the velocity of a fluid increases, the pressure decreases.  This causes planes to fly . 

• Archimedes' Principle
• Bernoulli's Principle
• Pascal's Principle

Which box has a higher density?  

• Box A
• Box B
• cannot be determined
• they are the same

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

An object weighing 500 Newtons on land is placed in water. It then weighs 450 Newtons. What is the buoyant force?

• 50 N
• 250 N
• 450 N
• 500 N

If a balloon is partially filled with helium and walked up a tall mountain, what would happen to it?

• get larger
• get smaller
• nothing
• get crushed

Tags

NGSS.MS-PS1-4

Who does this symbol belong to?

• Superman

• Thor

• Spiderman

• Batman

The pressure caused by the weight of the atmosphere is called what?

• pascal

• atmospheric pressure

• pressure

• force

Tags

NGSS.MS-ESS2-5