Tag: units - definitions and systems

The main quantity that measures the motion of a body is momentum. An object's momentum increases with the object's mass and with its velocity.

When current $ I $ flow in the circular loop of area $a$ than , magnetic moment will be $M=Ia= Am^2$

Ampere-hour is the unit of quantity of electricity or quantity of electric charge.

The universal gravitational constant G has a standard value of approximately 6.673 * 10^-11 Nm^2/kg^2.

Strain is defined as the ratio of change in dimension to the original dimension. Since it is a ratio of two identical physical quantities, it is a dimensionless quantity.

Permeability (mu) is related to magnetic field intensity H and magnetic flux density B by B = mu*H. The SI unit of B is Tesla (T) and H is Ampere per metre (A/m), so mu = B/H has units of T/(A/m) = T*m/A. Henry per metre (H/m) is also a standard unit, and Weber per ampere metre (Wb/A*m) is equivalent to H/m.

The given relation is ${ Iq }{ Z } $, since $q=It$.

The ratio of electric field intensity E (V/m) to magnetic field intensity H (A/m) is known as the intrinsic impedance of the medium. The unit is (V/m) / (A/m) = V/A, which is the definition of an Ohm.

To convert temperature from Kelvin to Celsius, subtract 273 from the Kelvin value. Therefore, 100 K - 273 = -173 degrees Celsius.

Joule and Calorie are units of energy. Kelvin is the SI unit of thermodynamic temperature, not energy.