Concepts

Uniform Motion

An object which moves with constant speed (covers equal distance for equal intervals of time)

Velocity

Rate of displacement covered with respect to time

Displacement

Distance covered by object in specific direction

Path length

Distance covered by the object in a given time

Linear Motion

The direction of the velocity remains constant and the path is a straight line

Mole

Amount of subtance containing the same number of particles as there are atoms in 0.012 kg of carbon 12

Candela

Source which emits radiation of frequency 540 x 10² Hz with radiant intensity of 1/683 watt per steradian

Ampere

Current between two straight parallel conductors separated 1m apart which generates 2 x 10⁻⁷ N/m

Kelvin

1 / 273.16 of thermodynamic temperature at triple point of water

Second

9.2 Billion vibrations of transition between two level of cesium-133 atom in ground state