Any object having a size and a mass will have its density. To observe the density of water, one must understand its frozen form. The structure of ice is very different from the structure of liquid molecules. Alignment and orientation of molecules in ice structure are well defined, whereas that in the liquid is dispersed. Therefore, this makes the ice to be less dense than the water. Ice contains some sir as well. So, this makes its density about 90 percent that of water.
There are specific important properties of water. All these properties are necessary to maintain a sustainable life on Earth. At the freezing point, the water becomes denser. This is usually seen in the winters. The lakes generally freeze because the cold water present at the surface sinks to the bottom of the lake. There are certain variations in the density of the water. This is because of the addition of certain substances and other molecules in it. Several substances such as salts, minerals, pesticides, gases, bacteria, etc. are present in water. All these substances are dissolved in the water. The more the amount of substance present in the water, the more will be the density of the water. Ice can float on water.
A very unique instrument measure is employed to measure the density of the water. This instrument is the Hydrometer. It is a simple scientific measuring device. The hydrometer is made of glass and is very similar to a thermometer. It has a cylindrical stem to which a weighted bulb is attached at the bottom. It makes it float in the upright position. To begin the measurement, the instrument is lowered down into a container that has water. It is held straight till it begins to float freely in the water in an upright manner. There are gradations on this instrument that are helpful during the measurement. The less-dense liquids will cause the hydrometer to float a little higher. While the denser liquid will make the hydrometer sink to the bottom. Water is kept as a standard for the measurement of other liquids. It usually has a mark of 1.000. Therefore, we can also say that the specific gravity of water is 1.000 at a temperature of 4Â°C. The mechanism of the hydrometer follows Archimedes principles of floating and occupying space. It has a variety of applications in water analysis, dairy industries, wine, and beverages industries. It is generally employed to measure the quality of the final product.
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