Ch 13 Fluids

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

What do we call the the amount of force exerted on a certain area?

• fluid

• pressure

• buoyant force

• normal force

The upward force exerted by a fluid is called the...

• buoyancy force

• density force

• fluidity force

• normal force

Water pressure increases as depth increases. 

• True
• False

Archimedes' Principle states that... 

• The buoyant force acting on an object equals the volume of the fluid displaced by the object. 
• The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
• The buoyant force acting on an object will always be equal. 

Which liquid is the least dense?

• oil
• water
• syrup 
• plastic bottle

Why do some substances float on water?

• they are warmer than water
• they are cooler than water
• they are more dense than water
• they are less dense than water

Helium balloons rise on earth because

• helium is less dense than air
• helium is more dense than air
• helium is cooler than air
• helium is warmer than air

What is a fluid?

• a non-solid state of matter as a gas or a liquid.

• A solid state of matter as an object

• the pressure caused by the weight of the atmosphere