# Question About Density: Lower Mass, Same Volume?

• B
• Sundown444

#### Sundown444

So if a car were to somehow have its density lowered by lowering the mass, but keeping the volume the same, would the car be more damageable and breakable than it was before, or would that depend on something else other than density?

Sundown444 said:
So if a car were to somehow have its density lowered by lowering the mass, but keeping the volume the same, would the car be more damageable and breakable than it was before, or would that depend on something else other than density?
I would depend on lots of factors. Surely you can image material such as composites that are MUCH stronger than existing car material but also lighter? Such are not used because they are prohibitively expensive, but ...

## 1. What is density?

Density is a measure of how much mass is contained in a given volume of a substance. It is often expressed as mass per unit volume, such as grams per cubic centimeter (g/cm3) or kilograms per cubic meter (kg/m3).

## 2. How is density affected by lower mass and same volume?

If the volume remains the same but the mass decreases, then the density will also decrease. This is because there is less mass occupying the same amount of space, resulting in a lower mass per unit volume.

## 3. Why is density an important property of matter?

Density is important because it can help identify and classify substances. It can also be used to determine the purity of a substance and to predict how it will behave in different situations, such as when mixed with other substances or when subjected to changes in temperature or pressure.

## 4. How is density measured?

Density is typically measured by dividing the mass of a substance by its volume. This can be done using various tools, such as a balance or a graduated cylinder, depending on the type of substance being measured.

## 5. Can the density of a substance change?

Yes, the density of a substance can change depending on various factors such as temperature, pressure, and the presence of impurities. For example, when a solid substance is heated and turns into a liquid, its density usually decreases because the particles have more space to move around in the liquid state.