Quantum annealing or Adiabatic quantum computation relies on the adiabatic theorem to undertake calculations. Air storage can be adiabatic, diabatic, or isothermal. Naturally occurring adiabatic processes are irreversible (entropy is produced). Kelvin cooler made of a 3He adsorption cooler coupled with an Adiabatic Demagnetization Refrigerator. The speed formula 4 can be calculated thermodynamically based on adiabatic expansion. Adiabatic cooling occurs when air rises and expands. There are two fundamental types of density perturbations called "adiabatic" and "isocurvature". In general, subsidence will dry out an air mass by adiabatic or compressional heating. Subsidence will generally dry out an air mass by adiabatic, or compressional, heating. This causes the relative humidity to increase due to the adiabatic cooling. In general, subsidence will dry out an air mass by adiabatic, or compressional, heating. Adiabatic cooling does not have to involve a fluid. Additionally, DU penetrators exhibit significant adiabatic shear band formation. Onnes' method relied upon depressurising the subject gases, causing them to cool by adiabatic cooling. The low temperatures were achieved using the method of adiabatic demagnetization.