Density

Front

What is density?

Back

Density is defined as mass divided by volume (density = mass/volume).

Front

What happens to the density of an object if its mass increases while its volume remains the same?

Back

The density of the object increases.

Front

What happens to the density of an object if its volume increases while its mass remains the same?

Back

The density of the object decreases.

Front

Why do ships made of steel float on water?

Back

Ships float because their overall density is less than that of water due to the large volume of air inside them.

Front

What is the relationship between the density of an object and the density of the liquid it is placed in for it to float?

Back

An object will float if its density is less than the density of the liquid.

Front

What is the principle of buoyancy?

Back

The principle of buoyancy states that an object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced.

Front

What does a Newton meter measure when connected to a floating object?

Back

A Newton meter will read 0N when connected to a floating object because the upthrust balances the weight.

Front

What are the two forces acting on a floating object?

Back

The two forces are weight (downward force) and upthrust (upward force).

Front

What does it mean when the forces of weight and upthrust are balanced?

Back

It means the object is floating and not sinking or rising.

Front

If an object has a density greater than the liquid it is placed in, what will happen?

Back

The object will sink.