The Ruby fluorescence scale measures this quantity in a device by exciting electrons within its transparent chamber. Post-perovskite is a phase with high values of this quantity in a type of magnesium silicate. In 2023, a paper claiming to have observed superconductivity at 294 Kelvin in nitrogen-doped lutetium hydride in an environment where this quantity is high was retracted due to allegations of faking data and self-plagiarism by its primary author, Rangas Dias. D-DIA and (*) diamond anvil cells can be used to subject (10[1])materials to high values of this quantity. Enthalpy is defined as internal energy plus volume (10[1])times this quantity. This quantity is proportional to temperature over volume according to the ideal gas law. Constant in isobaric processes, (10[1])for 10 points, name this quantity with SI unit Pascal, defined as force per area. ■END■