It is the outdoor temperature that would generate the same heat gain through the element without solar energy
The lightning formula is dependent on the distance at which lightning happens, the speed of sound in the air, time interval between flash and thunder.
The relationship between the recessional velocity and the proper distance of the galaxy that is measured in mega parsecs. H0-Hubble's constant r-radius of the galaxy
Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it
The word displacement implies that an object has moved, or has been displaced. Displacement is defined to be the change in position of an object