Boyle's law of the gas, and "k" is a constant. The equation states that the product of pressure and volume is a constant for a given mass of confined gas and this holds as long as the temperature is constant. For comparing the same substance under two different sets of conditions, the law can be usefully expressed as The equation shows that, as volume increases, the pressure of the gas decreases in proportion. Similarly, as volume decreases, the pressure of the gas increases. The law was named after chemist and physicist Robert Boyle, who published the original law in 1662. This relationship
Electron degeneracy pressure temperature. Electrons are part of a family of particles known as fermions. Fermions like the proton or the neutron follow Pauli's principle and Fermi–Dirac statistics. In general, for an ensemble of non-interacting fermions, also known as Fermi gas, each particle can be treated independently with an energy given by the purely kinetic term, where is the momentum of one particle and its mass. Every possible momentum state of an electron within this volume up to the Fermi momentum being occupied. The degeneracy pressure at zero temperature can be computed as where "V" is the total volume of the system and