# How to Find Densities of Pennies

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Density is a representation of the mass of an object based on its volume. It is commonly expressed in grams per cubic centimeter. Water has a density of 1 g/cm^3. Densities are typically calculated by determining the weight and volume of an object and then dividing the volume into its weight.

### Things You'll Need

• Scale
• Calipers
• Weigh a penny on a scale that can provide accurate results down to a milligram. Note that the weight should be made in grams.

• Measure the diameter and thickness of the penny with calipers that can give results in centimeters.

• Calculate the volume of the penny in cubic centimeters by multiplying the thickness by the surface area. The surface area is calculated by using the formula pi x r^2, where r is the radius, which is one half of the diameter.

• Divide the weighed mass of the penny in grams by the calculated volume. This will result in the density in grams per cubic centimeter.

## References

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