Definition. The
density
of the material is defined as mass per unit volume, typically measured in kg/m
3
. … Unlike density, specific weight is not a fixed property of a material. It depends on the value of the gravitational acceleration, which varies with location.
What is the difference between mass density and specific weight?
The ratio between the mass of the liquid and its unit volume is called density. The ratio between the weight of a given substance to the density of an equal volume of water or other reference material is known as
specific gravity
. … It has no unit.
What is difference between weight and specific weight?
In physics, the weight of the substance differs
from its mass
. The weight is the gravitational force that pulls any object to Earth. The specific weight corresponds to the weight per unit of the volume and can be calculated from the specific gravity.
What is specific mass?
General Physics)
a measure of the compactness of a substance
, expressed as its mass per unit volume. It is measured in kilograms per cubic metre or pounds per cubic foot. Symbol: ρ See also relative density.
Is specific gravity and specific weight same?
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.
How can I calculate weight?
Weight is a measure of the force of gravity pulling down on an object. It depends on the object’s mass and the acceleration due to gravity, which is 9.8 m/s
2
on Earth. The formula for calculating weight is
F = m × 9.8 m/s
2
, where F is the object’s weight in Newtons (N) and m is the object’s mass in kilograms.
What is the specific weight of water?
A commonly used value is the specific weight of water on Earth at 4 °C (39 °F), which is 9.807 kilonewtons per cubic metre or
62.43 pounds-force per cubic foot
. The terms specific gravity, and less often specific weight, are also used for relative density.
Is density a weight?
Density is used to measure the matter in a unit volume of an object whereas
weight refers to the gravitational force applied of any object
. The components of Density are mass and volume whereas, on the other hand, the components of weight are mass and gravity.
What is the specific weight of steel?
It is the ratio of the weight of steel per unit volume.
It is also called the specific weight of steel. Its SI unit is kg/m3. Unit weight of steel is
7850 kg/m3
.
What is specific gravity of pure water?
In less dense liquids the hydrometer will float lower, while in more dense liquids it will float higher. Since water is the “standard” by which other liquids are measured, the mark for water is probably labeled as “
1.000
“; hence, the specific gravity of water at about 4°C is 1.000.
How do you calculate specific mass?
As per the specific gravity definition, the value is calculated as
the density of that substance divided by water density at 40C
. To obtain the specific weight of a substance, its specific gravity is multiplied by 1000 (density of water in kg/m3).
What is specific mass of liquid?
The specific gravity of a liquid is
the relative weight of that liquid compared to an equal volume of water
. The specific gravity of water is de facto 1. Liquids that are lighter than water have a specific gravity less than 1 and those heavier than water have a specific gravity greater than 1.
What is density and specific gravity?
Density is defined as mass per unit volume. It has the SI unit kg m
– 3
or kg/m
3
and is an absolute quantity.
Specific gravity is the ratio of a material’s density with that of water at 4 °C
(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.
What is specific weight equal to?
: the weight of a substance per unit volume in absolute units
equal to the density multiplied by the acceleration of gravity
.
Is specific weight dimensionless?
Specific gravity is
a dimensionless quantity
; that is, it is not expressed in units. … An object with a density of 85 kg/m
3
has a specific gravity of 0.085, and will float high on the surface of a body of water. An object with a density of 85 g/cm
3
has a specific gravity of 85, and will sink rapidly.
