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superconductivity at 294 Kelvin in nitrogen-doped lutetium hydride in an environment where this quantity is high (15[1])was retracted (-5[1])due to allegations of faking data and self-plagiarism by its primary author, Rangas Dias. D-DIA and (*) diamond anvil cells can be used (10[1])to subject materials to high values of this quantity. (10[1])Enthalpy (-5[1])is defined as internal (10[1])energy plus volume times this quantity. This quantity is proportional to temperature over volume according to the ideal gas (10[1])law. Constant in isobaric processes, for 10 points, name this quantity with SI unit Pascal, defined as force per area. ■END■ (10[2])