Which statement is true about density?

Which statement is true about density?

• A. Density is a measure of mass per unit volume
• B. Density equals volume divided by mass
• C. Density is density times volume
• D. Density remains constant regardless of mass

Answer: (B)

Density tells us how much matter is packed into a given amount of space. It is defined as mass divided by volume (D = m / V). This means more mass in the same space makes density higher, while increasing the space (volume) with the same mass lowers density. The true statement is that density is mass per unit volume. Saying density equals volume divided by mass would be the reciprocal, which isn’t how density is defined. Saying density is density times volume would imply D = D × V, which isn’t correct for general cases. And claiming density remains constant regardless of mass isn’t accurate because density can change with conditions like temperature and pressure, or with changes in phase, even though for a given substance at a fixed state it can be treated as constant.

Density tells us how much matter is packed into a given amount of space. It is defined as mass divided by volume (D = m / V). This means more mass in the same space makes density higher, while increasing the space (volume) with the same mass lowers density.

The true statement is that density is mass per unit volume. Saying density equals volume divided by mass would be the reciprocal, which isn’t how density is defined. Saying density is density times volume would imply D = D × V, which isn’t correct for general cases. And claiming density remains constant regardless of mass isn’t accurate because density can change with conditions like temperature and pressure, or with changes in phase, even though for a given substance at a fixed state it can be treated as constant.