The density of states as a function of this energy E is:

The relation between wavevector, κ and energy E provides the electronic band structure.

We heat the gas up with an external source of energy, adding an amount of energy E to the system.

Since the energy E of the ball decreases, its mass m must also decrease.

Internal energy E is basically total energy of the sample.

At any energy E, the value of the momentum p is found from the conservation equation:

Say you distribute an energy E among N logic gates.

The energy E required for this task is:

The condition for a particle of energy E flying by to be 'trapped' and go into an orbit:

The energy "E" can be considered a random variable, having the probability density.