Physics Formula
Density Formula
Relates the mass of a substance to its volume.
Formula Summary
Density
Relates the mass of a substance to its volume.
- Category
- Physics
- Equation
- ρ = m ÷ V
- Calculator
- Use Density Calculator →
Equation
ρ = m ÷ V
Variables
- ρ = density
- m = mass
- V = volume
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.
Explanation
Density describes how much mass is contained in a given volume. It helps compare how tightly matter is packed in different substances.
Worked Example
A substance with a mass of 200 g and volume of 50 cm³ has a density of 200 ÷ 50 = 4 g/cm³.
Common Mistakes
- Mixing mass and volume units without conversion.
- Confusing density with weight.
- Using the wrong volume measurement.
Applications
- Identifying unknown materials.
- Chemistry and laboratory measurements.
- Calculating mass or volume from known density.
Related Formulas
Ideal Gas Law
PV = nRT
Relates pressure, volume, amount, and temperature of an ideal gas.
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