Density

Density is a measure of how much mass is contained in a given volume. It is calculated by dividing the mass of an object by its volume. The formula for density is:

Density = Mass / Volume

Units of Measurement

The standard unit for density is kilograms per cubic meter (kg/m³). However, other common units include grams per cubic centimeter (g/cm³) and pounds per cubic inch (lb/in³).

Density of Common Substances

Here are the densities of some common substances:

• Water: 1000 kg/m³ (1 g/cm³)
• Iron: 7874 kg/m³
• Air: 1.2 kg/m³
• Gold: 19320 kg/m³
• Wood: 600-800 kg/m³

Application of Density

Density is used in various scientific and practical applications, such as determining the purity of substances, identifying unknown materials, and designing and building objects with specific properties, such as buoyancy and strength.

Study Guide

To understand density, it's important to grasp the concept of mass and volume, as well as the relationship between the two. Here are some key points to focus on when studying density:

1. Understand the formula for density and how to calculate it.
2. Learn the units of measurement for density and how to convert between them.
3. Memorize the densities of common substances for reference.
4. Practice applying the concept of density to solve problems involving mass and volume.

Remember to use units when solving problems involving density and always make sure to include the proper unit in your final answer.