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# How to Determine Specific Gravity?

How to calculate and measure specific gravity. If the density of a substance is known, to calculate the specific gravity of a substance simply divide the density of the substance by the density of water or air.

## How to Determine Specific Gravity?

Determining specific gravity is an important step in any scientific investigation. It is the measure of the density of a substance compared to the density of water, and is used to compare the densities of different substances. It is also used to determine the purity of a material, since changes in specific gravity can indicate the presence of impurities. Knowing how to determine specific gravity can be a useful tool for scientists studying a variety of different materials.

The most common method for determining specific gravity is to use a hydrometer. A hydrometer is a device that contains a weighted float that floats in the material being tested. The float is calibrated so that the depth of the float in the material is directly related to the specific gravity of the material. To use a hydrometer, the material being tested is placed into a container, and the hydrometer is inserted into the material. The reading on the hydrometer is then used to calculate the specific gravity.

Another way to determine specific gravity is through the use of a balance. A balance is calibrated to measure the weight of an object, and the weight of an object is directly related to its specific gravity. To use a balance to measure specific gravity, the material being tested is placed on the