Mass, Volume, Density

Buoyancy applies to all of the following substances, except:

• oxygen

• clay

• milk

• saltwater

A rock dropped into a glass of water raises the water by 40 millilitres (mL). What can you infer about the rock?

• It has a mass of 40 grams (g)

• It has a density of 40 grams per millimetre (mm)

• It has a volume of 40 millilitres (mL)

• It has a weight of 40 kilograms (kg)

If Moby weighs 570 kg on land, and he displaces 320 kg of water, how much does he weigh underwater?

• 730 kg

• 490 kg

• 320 kg

• 250 kg

A tennis ball is placed in a bowl filled to the brim with water. Which of the following statements is true:

• The water that spills out weighs more than the ball

• The water that spills out has less volume than the ball

• The water that spills out weighs less than the ball

• Since the ball floats, no water spills out

Density is the relationship between which two quantities?

• mass and volume

• mass and weight

• volume and weight

• mass and buoyant force

How does an object's density affect the buoyant force acting on it?

• The more dense the object, the greater the buoyant force

• The less dense the object, the greater the buoyant force

• Density is equivalent to buoyant force

• Density has no effect on buoyant force

Which of the following objects has negative buoyancy?

• 
• 
• 
• 

A submerged submarine that remains at a constant depth has _________ buoyancy.

• positive

• negative

• neutral

• no

A fully loaded cruise ship leaves port weighing 50 000 tonnes. How much water does it displace?

• 50 000 tonnes

• more than 50 000 tonnes

• less than 50 000 tonnes

• 50 000 litres

Hot air balloons rise when the air inside the balloon is heated. Which statement must be false?

• Hot air is less dense than cool air

• The volume of the balloon is equal to the volume of air it displaces

• As the air in the balloon cools, the density decreases

• The air in the balloon weighs more than the air it displaces