ch 7 gasses and liquids

A rock of irregular shape sinks to the bottom of water when placed in it. Which two of the following, when used together, could be used to determine its density?

• Measure the mass of the rock on a scale

• Measure the mass of the beaker of water on a scale

• Place the rock in a beaker and measure the change in height of the water

• Place the rock in a beaker and measure the height of the water above it

A hydraulic lift has a left and right column of different areas. Which side has the greater pressure?

• A₁

• ^A₂

• Same

A hydraulic lift has a left and right column of different areas. Which side should a car be placed on to be lifted by the system with the least input force?

• A₁

• ^A₂

• Same

The upward force exerted by a liquid on an object immersed in or floating on the liquid

• pressure
• buoyant force
• normal force
• gravity

When the weight of an object is greater than the buoyant force, the object will ... 

• Sink
• Float 
• Expand
• Shrink

What direction is the buoyant force in?

• Downward
• Left
• Right
• Upward

If the weight of the water displaced is the same as the weight of the object placed in the water, the object will sink.

• True
• False

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Which box has a higher density?  

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

Which box has a higher density?  

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