Fundamental quantities in physics.

 Their are seven fundamental quantities in physics 

1) Length:  m(meter) is si unit of length. 

           It is defined as fix numerous value 299792458 m/s(in vacuum),whear s is defined as frequency of caesium 

2) Mass: kg(kilogram)is si unit of mass.

            It is defined as by taking a fix numourouse value of plank's constant 6.62607015× 10^-34 j.s (joule.second)

Here,we can see that mass is expressed in form of energy in term of joule , it is due to E= MC^2.

3) Time:(s) second is si unit of time.

            It is defined as by taking a fix numourouse value of caesium frequency (caesium -133atom) hyperfine of transmission frequency of caesium to be 9192631770 when expressed in form of Hertz.

4)Temperature (thermodynamics): k(Kelvin) is si unit of temperature.

             It is defined as by taking a fix numourouse value of boltzmann constant 1.380649×10^-23.whezr expressed in unit of j/k

5)Electric (charge):A(ampere) is si unit of electric current (charge).

              It is defined as by taking fixed numourouse value of e ( elementary charge) 1.602176634×10^-19C(Ampere/second).

6) Amount of substance: mol(mole) is si unit of Amount of substance.

             It is defined as fix numourouse value of partical that's 6.02214076×10^23. partical can be of any substances.

7)Luminous Intensity:cd(candela)is si unit of luminous intensity in a given direction.

            It is defined as fix numourouse value of monochromatic radiation of frequency 540×10^12Hz.

There are two additional unit which is used in physics by using mathematics term that is RADIAN(for plane angle) and STRDIAN (for solid 3-D angle).

Some value which can be used for solving numerical that's

🌟Speed of light (vaccume): 3×10^8m/s

🌟Plank's constant:6.67×10^-34j.s

🌟electric charge in electron:1.6×10^-19c

🌟Mole:6.022×10^23.

Rest of quantities are derived by help of these quantities.

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