Review on Density

Front

What is density?

Back

Density is defined as mass per unit volume, typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

How do you determine if an object will sink or float in water based on its density?

Back

An object will float in water if its density is less than that of water (1 g/mL). If its density is greater than 1 g/mL, it will sink.

Front

What is the formula for calculating density?

Back

Density (D) is calculated using the formula: D = mass (m) / volume (V).

Front

If an object has a mass of 30 g and occupies a volume of 15 mL, what is its density?

Back

The density is 2 g/mL, calculated as D = 30 g / 15 mL.

Front

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

Back

If the mass increases while the volume remains constant, the density of the object increases.

Front

What is the principle of displacement in relation to measuring volume?

Back

The principle of displacement states that the volume of an irregular object can be measured by the amount of liquid it displaces when submerged.

Front

How do you calculate the volume of an object using water displacement?

Back

To calculate the volume using water displacement, measure the initial water level, submerge the object, and then measure the new water level. The volume is the difference between the two levels.

Front

What is the density of gold if a 27 g piece displaces 3 mL of water?

Back

The density of gold is 9 g/mL, calculated as D = 27 g / 3 mL.

Front

What is the significance of a density of 1 g/mL in relation to water?

Back

A density of 1 g/mL is the density of water at 4°C, serving as a reference point for determining whether other substances will sink or float.

Front

If an object has a density of 0.8 g/mL, what will happen if it is placed in water?

Back

The object will float because its density is less than that of water.