Specific Mass, density and Specific weight || Specific mass in hindi || Specific weight in hindi
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The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume:[1]
where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume,[2] although this is scientifically inaccurate – this quantity is more specifically called specific weight.
For a pure substance the density has the same numerical value as its mass concentration. Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure.
To simplify comparisons of density across different systems of units, it is sometimes replaced by the dimensionless quantity "relative density" or "specific gravity", i.e. the ratio of the density of the material to that of a standard material, usually water. Thus a relative density less than one means that the substance floats in water.
The density of a material varies with temperature and pressure. This variation is typically small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance (with a few exceptions) decreases its density by increasing its volume. In most materials, heating the bottom of a fluid results in convection of the heat from the bottom to the top, due to the decrease in the density of the heated fluid. This causes it to rise relative to more dense unheated material.
The reciprocal of the density of a substance is occasionally called its specific volume, a term sometimes used in thermodynamics. Density is an intensive property in that increasing the amount of a substance does not increase its density; rather it increases its mass.
What is Specific Mass and Specific weight
What is Specific Mass and Specific weight in hindi
Specific Mass and Specific weight In hindi
Define Specific Mass and Specific weight
Define Specific Mass and Specific weight in hindi
Definition of Specific Mass and Specific weight
Definition of Specific Mass and Specific weight in hindi
Hindi mein Specific Mass and Specific weight
Specific Mass and Specific weight Kya hota hai
Class 11 physics Specific Mass and Specific weight
Class 11 physics Specific Mass and Specific weight in hindi
Class 11 physics Specific Mass and Specific weight
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Видео Specific Mass, density and Specific weight || Specific mass in hindi || Specific weight in hindi канала Gear Institute Mechanical Engineering Videos
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SSC JE 2023 LIVE CLASSES (TECHNICAL +NON TECHNICAL) (2 YEAR VALDITY)
http://bit.ly/3uPICTG
SSC JE 2023 LIVE CLASSES (TECHNICAL ONLY)
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Autocad + Siements + Nx + Catia
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The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume:[1]
where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume,[2] although this is scientifically inaccurate – this quantity is more specifically called specific weight.
For a pure substance the density has the same numerical value as its mass concentration. Different materials usually have different densities, and density may be relevant to buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure.
To simplify comparisons of density across different systems of units, it is sometimes replaced by the dimensionless quantity "relative density" or "specific gravity", i.e. the ratio of the density of the material to that of a standard material, usually water. Thus a relative density less than one means that the substance floats in water.
The density of a material varies with temperature and pressure. This variation is typically small for solids and liquids but much greater for gases. Increasing the pressure on an object decreases the volume of the object and thus increases its density. Increasing the temperature of a substance (with a few exceptions) decreases its density by increasing its volume. In most materials, heating the bottom of a fluid results in convection of the heat from the bottom to the top, due to the decrease in the density of the heated fluid. This causes it to rise relative to more dense unheated material.
The reciprocal of the density of a substance is occasionally called its specific volume, a term sometimes used in thermodynamics. Density is an intensive property in that increasing the amount of a substance does not increase its density; rather it increases its mass.
What is Specific Mass and Specific weight
What is Specific Mass and Specific weight in hindi
Specific Mass and Specific weight In hindi
Define Specific Mass and Specific weight
Define Specific Mass and Specific weight in hindi
Definition of Specific Mass and Specific weight
Definition of Specific Mass and Specific weight in hindi
Hindi mein Specific Mass and Specific weight
Specific Mass and Specific weight Kya hota hai
Class 11 physics Specific Mass and Specific weight
Class 11 physics Specific Mass and Specific weight in hindi
Class 11 physics Specific Mass and Specific weight
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Видео Specific Mass, density and Specific weight || Specific mass in hindi || Specific weight in hindi канала Gear Institute Mechanical Engineering Videos
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30 марта 2020 г. 20:52:02
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