From the equations governing stellar energy release, clear to those who can read them.

In most realistic physical situations, the equation governing the wave is only approximately linear.

The interact according the the principles laid out in Maxwell's equations governing those fields.

Such models are based on equations governing the motions and forces affecting motion of fluids.

These equations govern, or predict, functions of physical phenomena, like heat, sound and electromagnetism.

The basic equations governing noise phenomena were derived from first principles and applied to specific examples.

The equations governing the development of the populations are:

The differential equations governing the heat exchanger may now be written as:

These equations govern the power, efficiencies and other factors that contribute in the design of Turbo-machines thus making them very important.

A reed actually produces sound because the system of equations governing its dynamics has oscillatory solutions.