Specific weight
- Table of contents.
- Definition. Specific weight is defined as the ratio between weight and volume. Specific weight can also be defined as...
- Formula.
- Unit of measurement. The symbol used for specific weight is the Greek letter γ (gamma). The SI unit of measurement for...
- Example on how to calculate specific weight. The density of water at 10 °C is 999.75...
Full Answer
What is the formula for specific weight?
Definition of specific weight. : the weight of a substance per unit volume in absolute units equal to the density multiplied by the acceleration of gravity.
What is density vs specific weight?
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°C, which is 9.807 kN/m3 or 62.43 lbf/ft3.The terms specific gravity, and less often …
What is the relationship between specific weight and specific gravity?
May 24, 2021 · Specific weight The specific weight of a soil is its weight per unit of volume. The term is often used to characterize the solid part (particles) of a soil. The units of specific gravity are: [F / L 3 ]. Unit Weight Unit weight is defined as the weight of a body per unit volume.
How to find the specific weight of an object?
The specific weight (also known as the unit weight) is the weight per unit volume of a material. The symbol of specific weight is γ (the Greek letter Gamma). A commonly used value is the specific weight of water on Earth at 5°C which is 62.43 lbf/ft 3 or 9807 N/m 3. [1]
What is meant by specific weight?
Definition of specific weight : the weight of a substance per unit volume in absolute units equal to the density multiplied by the acceleration of gravity.
What is the SI unit of specific weight?
N/m3Specific Weight is defined as weight per unit volume. Weight is a force. The SI unit for specific weight is [N/m3]. The imperial unit is [lb/ft3].
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.
How do you find the specific weight?
Multiply the density by the acceleration of gravity (9.81) to calculate the specific weight. In our example, the specific weight is 840 x 9.81 = 8,240.4.24-Apr-2017
What is the difference between specific weight and specific 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.09-Feb-2012
What is specific weight of liquid?
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 γ (gamma) and has dimensions of force per unit volume.
What is specific gravity Class 11?
Specific gravity refers to the ratio of the density of an object and the reference material. Furthermore, the specific gravity can tell us if the object will sink or float in reference material. Besides, the reference material is water that always has a density of 1 gram per cubic centimeter or 1 gram per millimeter.
What is specific gravity in simple words?
Definition of specific gravity : the ratio of the density of a substance to the density of some substance (such as pure water) taken as a standard when both densities are obtained by weighing in air.
How do you calculate mass from specific weight?
Calculating Mass From Specific Gravity In the imperial system, multiply by 1.94 slug/ft3, which is the density of water in slugs. Once you know density, you can calculate mass per unit volume. All you have to do is multiply that density by the volume of the solid or liquid to find the mass of the solid or liquid.08-Dec-2020
How do you calculate specific weight from specific volume?
0:466:18Density, Specific Volume, and Specific Gravity - YouTubeYouTubeStart of suggested clipEnd of suggested clipWe can use the density of it to come up with the mass. So if Rho is equal to the mass. Times theMoreWe can use the density of it to come up with the mass. So if Rho is equal to the mass. Times the volume. Then the mass is going to be equal to the density or Rho times the volume.
What is specific gravity of water?
1 kgWater has a density of 1 kg/l at 4°C. When the specific gravity is defined based on water at 4°C, then the specific gravity is equal to the density of the liquid....4.6. 2 Specific Gravity.AliphaticsSpecific gravity [kg/l]Tetrachloroethylene1.62360 more rows
Definition
The specific weight, γ, of a material is defined as the product of its density, ρ, and the standard gravity, g:
Applications
In fluid mechanics, specific weight represents the force exerted by gravity on a unit volume of a fluid. For this reason, units are expressed as force per unit volume (e.g., N/m 3 or lbf/ft 3 ). Specific weight can be used as a characteristic property of a fluid.
What is specific gravity?
Specific gravity is the relationship between the weight and volume of a substance . Since the weight of an object is the extent to which the attraction of the Earth acts on it, and at the same time the volume is the surface that said object occupies, the specific weight constitutes the relationship between both properties expressed in Newtons per ...
What is unit weight?
Unit weight is defined as the weight of a body per unit volume. The unit weight of the soil varies according to the water content of the soil, defined as: wet unit weight (unsaturated), saturated unit weight and dry unit weight.
How does specific gravity affect density?
The relationship between specific gravity and density is the same as that between the weight and mass of a substance. The density has to do with the level of accumulation of matter in an object or substance, ie, the amount of material that comprises; and since the specific weight is nothing more than the force with which the Earth attracts a unit of mass of said matter, it is evident that a substance whose particles are denser together, that is, more compact than others, will be attracted with more force by gravity than other more dispersed particles.
How is mass measured?
Mass is measured in kilograms (kg) or grams (g). The mass is measured with the balance. The weight is the force exerted by gravity on a mass. Weight is measured in newtons (N) or kilograms force. Weight is measured with the dynamometer.
Changes of specific weight
Unlike density, specific weight is not absolute. It depends upon the value of the gravitational acceleration, which varies with location. A significant influence upon the value of specific gravity is the temperature of the material.
Uses
In fluid mechanics, specific weight represents the force exerted by gravity on a unit volume of a fluid. For this reason, units are expressed as force per unit volume (e.g., lb/ft 3 or N/m 3 ). Specific weight can be used as a characteristic property of a fluid.
What is specific weight?
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. The specific weight of any given substance is not constant — it can change based on ...
How does density change?
Density changes based on pressure and temperature, and since specific weight is based on density, it can change as well. The density decreases as the temperature increases because the molecules in the substance move farther apart. Density increases as pressure increases because pressure forces the molecules closer together.
What does gamma mean in math?
The lower-case Greek letter gamma, which looks something like a "y," usually represents specific weight in equations. Typically, the equation "gamma = rho* g" is used to calculate specific weights. Rho, a Greek letter which looks like a rounded "p," represents the density of the substance — the mass of the substance relative to its volume.
What is the acceleration of the Earth?
Sometimes called the local constant, "g" represents the acceleration due to gravity, which is 32.2 feet per square second (about 9.81 meters per square second) at the Earth's surface.
What is SG in math?
Specific Gravity (Relative Density) - SG - is a dimensionless unit defined as the ratio of the density of a substance to the density of water - at a specified temperature and can be expressed as
Is density a physical property?
Density is a physical property - constant at a given temperature and pressure - and may be helpful for identification of substances. Below on this page: Specific gravity (relative density), Specific gravity for gases, Specific weight, Calculation examples. Se also: Densities for some common materials.
What is specific weight?
Specific weight of a fluid is defined as the ratio of the weight of a fluid to the volume of the fluid. Or weight of a fluid per unit volume is called its specific weight.
What is the definition of specific gravity?
Specific gravity is defined as the ratio of the density of a fluid to the density of a standard fluid. For liquids, water is taken as the standard fluid where as for gases air is taken as the standard fluid. It is denoted by the symbol S. specific gravity, S = (density of liquid)/ (density of water)
What is the density of a fluid?
Density (mass density) of a fluid is defined as the ratio of mass of a fluid to the volume of the fluid. In other words it is defined as the mass per unit volume of a fluid.
Choose the Right Synonym for specific
special, especial, specific, particular, individual mean of or relating to one thing or class. special stresses having a quality, character, identity, or use of its own. special ingredients especial may add implications of preeminence or preference.
Examples of specific in a Sentence
Adjective Is there anything specific you want for dinner? There is a specific word for this kind of feeling.
Kids Definition of specific
2 : relating to a particular individual or situation There are problems specific to this project.
Legal Definition of specific
What made you want to look up specific? Please tell us where you read or heard it (including the quote, if possible).
Table of Contents
Definition
- Specific weight is defined as the ratio between weight and volume. Specific weight can also be defined as the product between density and gravitational acceleration. Specific weight, unlike density, is not absolute, it depends on the value of the gravitational acceleration (g), which varies depending on altitude and latitude. Go back
Formula
- where: G [N] – weight V [m3] – volume m [kg] – mass g [m/s2] – gravitational acceleration The density ρ [kg/m3] is the ratio between mass (m) and volume (V): Replacing the expression of the density (2) in the formula of specific weight (1), we get: Go back
Unit of Measurement
- The symbol used for specific weight is the Greek letter γ (gamma). The SI unit of measurement for specific weight is [N/m3]. The unit of measurement for specific weight can easily be demonstrated from equation (3). The unit of measurement for density is [kg/m3]. The unit of measurement for gravitational acceleration is [m/s2]. Multiplying them as per equation (3) gives…
Example on How to Calculate Specific Weight
- Example 1. The density of water at 10 °C is 999.75 kg/m3. Knowing that gravitational acceleration is 9.81 m/s2, calculate the specific weight of waterat 10 °C. Applying the formula of specific weight (3), we get: Example 2. The density of air at 20 °C is 1.2041 kg/m3. Knowing that gravitational acceleration is 9.81 m/s2, calculate the specific weight of airat 20 °C. Applying the …
Specific Weight of Water
- Since water density varies with temperature, the specific weight of waterwill be function of temperature. Source: U.S. Department of the Interior, Bureau of Reclamation, 1977, Ground Water Manual, from The Water Encyclopedia, Third Edition, Hydrologic Data and Internet Resources, Edited by Pedro Fierro, Jr. and Evan K. Nyler, 2007. Go back
Specific Weight of Air
- Since air density varies with temperature, the specific weight of airwill be function of temperature. Source: Wikipedia. Go back