What Is Specific Gravity?

Specific gravity is also called relative density. The specific gravity of solids and liquids is the ratio of the density of the substance (completely compacted) to the density (999.972 kg / m ³ ) of pure H ₂ O at standard atmospheric pressure, 3.98 ° C. The specific gravity of a gas is the ratio of the density of the gas to the density of air under standard conditions. The specific gravity of a liquid or solid indicates whether they sink or float in another fluid.

Density is there

Basic explanation of specific gravity

1. [specific gravity]: The ratio of the density of a substance to the density of a substance (such as pure water at its maximum density of 4 ° C) taken as the standard (the density of both is weighed in air) And obtained)

2. [proportion]: the weight of something in the whole

The proportion of industry in the entire national economy ^[1]

Weight citation explanation

1. The ratio of the weight of an object to its volume. In some countries, the specific gravity is defined as the ratio of the weight of a dry object completely dense (without pores) to the weight of the same volume of pure water at 4 ° C. For example, the specific gravity of gold is 19.3, and the specific gravity of mercury is 13.55.

2. The weight of a thing in the whole.

Mao Zedong's "On the Ten Major Relations" III: "During the first five-year plan, military and political expenses accounted for 30% of the total state budget expenditure. This proportion is too large." ^[1]