Question

Which describes a value for density?

A) a value for mass, such as kg, divided by a value for volume, such as m³
B) a value for volume, such as m³, divided by a value for mass, such as kg
C) a value for distance, such as m, divided by a value for area, such as m²
D) a value for time, such as s, divided by a value for temperature, such as °C

Answer 1

Density describes a value for mass (e.g., kg) divided by a value for volume (e.g., m³). It is a key physical property of materials, allowing for the conversion between mass and volume.

Step-by-step explanation:

The correct description of a value for density is A) a value for mass, such as kg, divided by a value for volume, such as m³. Density is defined as the mass-to-volume ratio of a substance, which is often expressed using the formula d = m/V. The SI unit of density is kilograms per cubic meter (kg/m³), but it is also commonly expressed in grams per cubic centimeter (g/cm³) for solids and liquids, and grams per liter (g/L) for gases.

For example, if a sample of iron has a mass of 23.4 grams and a volume of 3.00 cm³, the density of iron is calculated as 23.4 g/3.00 cm³, which equals 7.8 g/cm³. This numerical value is an essential factor in various calculations involving the physical properties of materials, and it is also used as a conversion factor between mass and volume.