The effect of temperature on the kinematic viscosity (ν) has also been described by a number of empirical equations.

For self-diffusion in gases at two different pressures (but the same temperature), the following empirical equation has been suggested:

In the case of very high concentrations, another empirical equation was proposed by Kitano et al.:

A simple empirical equation for the speed of sound in sea water with reasonable accuracy for the world's oceans is due to Mackenzie:

As a part of a broader scheme dealing with empirical equations in organic chemistry, the parachor was also revised.

The Bromley equation is essentially an empirical equation.

Named after its founder Kostiakov is an empirical equation which assumes that the intake rate declines over time according to a power function.

However, empirical equations of form (42) should apply to all materials (though, conceivably, modification might be needed for very sharp emitters).

There are only empirical equations to relate surface tension and temperature:

"It's the empirical equation of Larkin's disease applied to two hundred eighty-nine people."