Any 20 physical quantity and their SI units easy
Answers
Answer:
Explanation:
Base quantity Symbol Description SI base unit Dimension Comments
Length l The one-dimensional extent of an object metre (m) L
Mass m A measure of resistance to acceleration kilogram (kg) M extensive, scalar
Time t The duration of an event second (s) T scalar
Electric current I Rate of flow of electrical charge per unit time ampere (A) I Scalar,extensive
Temperature T Average kinetic energy per degree of freedom of a system kelvin (K) Θ intensive, scalar
Amount of substance n
Number of particles compared to the number of atoms in 0.012 kg of 12C mole (mol) N extensive, scalar
Luminous intensity L Wavelength-weighted power of emitted light per unit solid angle candela (cd) J scalar
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Derived quantity Symbol Description SI derived unit Dimension Comments
Absement A Measure of sustained displacement: the first integral of displacement m s L T vector
Absorbed dose rate Absorbed dose received per unit of time Gy s−1 L2 T−3
Acceleration a→ Change of the speed or velocity per unit time m s−2 L T−2 vector
Angular acceleration α Change in angular speed or velocity per unit time rad s−2 T−2
Angular momentum L Measure of the extent and direction an object rotates about a reference point kg m2 s−1 M L2 T−1 conserved quantity, pseudovector
Angular speed (or angular velocity) ω The angle incremented in a plane by a segment connecting an object and a reference point per unit time rad s−1 T−1 scalar or pseudovector
Area A Extent of a surface m2 L2 scalar
Area density ρA Mass per unit area kg m−2 M L−2
Capacitance C Stored charge per unit electric potential farad (F = A2 s4 kg−1 m−2) M−1 L−2 T4 I2 scalar
Catalytic activity Change in reaction rate due to presence of a catalyst katal (kat = mol s−1) T−1 N
Catalytic activity concentration Change in reaction rate due to presence of a catalyst per unit volume of the system kat m−3 L−3 T−1 N
Chemical potential μ Energy per unit change in amount of substance J mol−1 M L2 T−2 N−1 intensive
Crackle c→ Change of jounce per unit time: the fifth time derivative of position m s−5 L T−5 vector
Current density J → Electric current per unit cross-section area A m−2 L−2 I vector
Dose equivalent H Received radiation adjusted for the effect on biological tissue sievert (Sv = m2 s−2) L2 T−2
Dynamic viscosity η Measure for the resistance of an incompressible fluid to stress Pa s M L−1 T−1
Electric charge Q The force per unit electric field strength coulomb (C = A s) T I extensive, conserved quantity
Electric charge density ρQ Electric charge per unit volume C m−3 L−3 T I intensive
Electric displacement D Strength of the electric displacement C m−2 L−2 T I vector field
Electric field strength E→ Strength of the electric field V m−1 M L T−3 I−1 vector field
Electrical conductance G Measure for how easily current flows through a material siemens (S = A2 s3 kg−1 m−2) M−1 L−2 T3 I2 scalar
Electrical conductivity σ Measure of a material's ability to conduct an electric current S m−1 M−1 L−3 T3 I2 scalar
Electric potential V Energy required to move a unit charge through an electric field from a reference point volt (V = kg m2 A−1 s−3) M L2 T−3 I−1 extensive, scalar
Electrical resistance R Electric potential per unit electric current ohm (Ω = kg m2 A−2 s−3) M L2 T−3 I−2 extensive, scalar, assumes linearity
Electrical resistivity ρ Bulk property equivalent of electrical resistance ohm metre (Ω⋅m = kg m3 A−2 s−3) M L3 T−3 I−2 intensive, scalar
Energy E Capacity of a body or system to do work joule (J = kg m2 s−2) M L2 T−2 extensive, scalar, conserved quantity
Energy density ρE Energy per unit volume J m−3 M L−1 T−2 intensive