What are the base units in SI? Define the supplementary units and the quantities they measure.
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Base Units : The units of the base quantities, i.e., the quantities which are independent and are not usually defined in terms of other physical quantities, are called base units. The seven base quantities along with the
respective base SI units are as follows:
Length (metre),
Mass (kilogram),
Time (second),
Electric current (ampere),
Thermodynamic temperature (kelvin),
Luminous intensity (candela) and
Amount of substance (mole)
The Two more Dimensionless Quantities Defined in SI.
1. Plane angle : Its SI unit is radian
One radian is defined as the plane angle subtended at the centre of a circle by an arc equal in length to
the radius of the circle.
2. Solid angle : Its SI unit is steradian.
One steradian is defined as the solid angle subtended at the centre of a sphere by a surface of the sphere
equal in area to that of a square, having each side equal to the radius of the sphere.
Hope this helps...:)
Base Units : The units of the base quantities, i.e., the quantities which are independent and are not usually defined in terms of other physical quantities, are called base units. The seven base quantities along with the
respective base SI units are as follows:
Length (metre),
Mass (kilogram),
Time (second),
Electric current (ampere),
Thermodynamic temperature (kelvin),
Luminous intensity (candela) and
Amount of substance (mole)
The Two more Dimensionless Quantities Defined in SI.
1. Plane angle : Its SI unit is radian
One radian is defined as the plane angle subtended at the centre of a circle by an arc equal in length to
the radius of the circle.
2. Solid angle : Its SI unit is steradian.
One steradian is defined as the solid angle subtended at the centre of a sphere by a surface of the sphere
equal in area to that of a square, having each side equal to the radius of the sphere.
Hope this helps...:)
Answered by
1
Answer:
The SI base units and their physical quantities exist the meter for measurement of length, the kilogram for mass, the second for time, the ampere for electric current, the kelvin for temperature, the candela for luminous intensity, and the mole for amount of substance.
Explanation:
SI unit is an international method of measures that are utilized universally in technical and scientific investigation to avoid confusion with the units. Having a standard unit system exists important because it allows the whole world to understand the measures in one set of unit systems.
- Supplementary units stand for the dimensionless units that are utilized along with the base units to create derived units in the International System. The class of supplementary includes only two purely geometrical units, that exists the radian and the steradian.
Following is the table shows the base units in SI.
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