The specific weight, also known as the unit weight, is the weight per unit volume of a material. A commonly used value is the specific weight of water on Earth at 4 ยฐC (39 ยฐF), which is 9.807 kilonewtons per cubic metre or 62.43 pounds-force per cubic foot.
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What is specific weight used for?
Specific weight, also called unit weight or sometimes weight density, describes the weight of a substance relative to its volume. It is often used as a characteristic property of fluids and soils in the fields of fluid mechanics and soil mechanics, respectively.
What is the definition of specific gravity weight?
Specific weight is the ratio of the weight of an object to the object’s volume. In the case of specific gravity, it is the ratio of an object’s density to the density of water.
What is specific weight denoted by?
Specific weight, sometimes referred to as unit weight, is simply the weight of fluid per unit volume. It is usually denoted by the Greek letter ฮณ (gamma) and has dimensions of force per unit volume.
What is the difference between specific weight and density?
Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 ยฐC (where it is most dense and is taken to have the value 999.974 kg m-3). It is therefore a relative quantity with no units.
How do you find specific weight?
How do you find the SI unit of specific weight?
What is the difference between specific volume and specific weight?
Explicit volume is characterized as the quantity of cubic meters involved by one kilogram of a specific substance. Differentiate between specific weight and specific volume: The particular weight (otherwise called the unit weight) is the weight per unit volume of a material.
What is called specific gravity?
specific gravity, also called relative density, ratio of the density of a substance to that of a standard substance.
What is specific weight dimension?
Therefore, the weight is dimensionally represented as [M1 L1 T-2].
Why is it called specific gravity?
Usually specific means that the quantity does not depend on how much you consider, if you take 1 L of ethanol or 2 liters – they have the same SG because you need to compare it with the same amont of water and the volume goes away in the ratio.
What is specific density means?
Specific density is the ratio of the mass versus the volume of a material.
How are specific gravity and specific weight related?
Specific gravity is simply the ratio of the specific weight of a given liquid to the specific weight of water at 4ยฐ C (ฮณwater = 9.81 kN/m3 or 62.4 lb/ft3). This definition is helpful when comparing densities of different liquids.
What is specific gravity define it in terms of density and specific weight?
Specific gravity (SG) Specific gravity is defined as the ratio of material’s density to the density of water at 23ยฐC. SG refers to a measure of the ratio of the mass of a given volume of material at 23ยฐC to that of an equal volume of water at 23ยฐC (Sippel, 1958).
What is the specific weight of oil?
The density of most oils will range between 700 and 950 kilograms per cubic meter (kg/m3).
What is a specific unit?
Specific Unit costing allows you to specify a cost for each individual serialized item. You assign the cost when you add the serialized item to your inventory, or enter an originating transaction. The cost follows the item through its life and is used when the item is sold.
What is the symbol of specific gravity?
SYMBOL: s.g. DEFINITION: The ratio of the specific weight of a given substance to the specific weight of water at a standard reference temperature of 4ยฐ C.
What is the unit of specific unit?
unit of specific heat capacity is J k g – 1 K – 1 .
Is specific weight the same as gravity?
What is the difference between Specific Gravity and Specific Weight? Specific gravity is a dimensionless quantity whereas specific weight has dimensions. The specific gravity of a material is independent of the gravitational field, but the specific weight of a material is dependent on the gravitational field.
What is the specific weight of water?
The density of water at 4ยฐC is 1000 kg/m3. The equation for the specific weight of water is ฮณ = ฯ g [kN/m3] = 1000 x 9.81 = 9810 N (9.81 kN).
Why is specific gravity used?
The specific gravity value of an object can be used to determine approximately where the object will float at the surface of the liquid. The SG is a percentage of an object’s volume that will be below the surface, and the remaining percentage is visible above.
What is specific gravity examples?
The specific gravity of an object is the density of that object divided by the density of water. The density of water is 1,000 kilograms per meter cubed. For instance, the density of gold is 19,300 kilograms per meter cubed. So the specific gravity of gold is 19.3.
Is specific weight a dimensionless quantity?
Specific gravity is a dimensionless quantity; that is, it is not expressed in units. To find the sp gr of a solid or liquid, you must know its density in kilograms per meter cubed (kg/m3) or in grams per centimeter cubed (g/cm3).
What is specific gravity theory?
Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.
What is specific gravity of water?
Because water at 4 degrees Celsius is the standard scientists use to determine specific gravity, it follows that its specific gravity is 1. However, a water sample at a different temperature or pressure or one containing impurities has a density that differs slightly.