Without specialized equipment, it is impossible to measure a substance's density directly. However, density can be calculated by first weighing and then finding the volume of an item.
Place the item on an accurate scale, and record the mass in grams.
If the item is a regular shape like a cube, volume can be calculated using a mathematical formula. If the item is an irregular shape, it must first be broken down into regular shapes before the volume can be calculated. Record the volume in cubic centimeters.
To find the density of the item, divide the mass by the volume to determine density in units of grams per cubic centimeter.
1. Determine the radius of the sphere. You can do this by measuring the circumference, or distance around the sphere at the widest point and then dividing by 2?. For example, if the
http://www.ehow.com/how_5529785_calculatedensity...

1 Distinguish between volume and density. Volume (v)  It's the space occupied by an 3dimensional object enclosed by a close boundary. Density (ρ)  It's simply mass/unit volume
http://www.wikihow.com/CalculateVolumeandDensit...

It is calculated by dividing the population by the area.Therefore, you would need to have the number of people in the numerator(on the top of the fraction) and the number of square
http://wiki.answers.com/Q/How_is_Population_Densit...

Density is equal to mass divided by its volume: D (density) = M (mass) / V (volume)
http://www.chacha.com/question/howisdensitycalc...
