Another measurable volumetric derivative is the isothermal compressibility, formula 25. It also solves the issue of fluid compressibility at transonic and supersonic speeds. The rice is chosen for tensile strength and compressibility. This variation of density is referred to as compressibility. The parts are made from boron nitride powders adding boron oxide for better compressibility. The compressibility of water is a function of pressure and temperature. Pneumatic actuators operate on the basis of gas compressibility. The degree of compressibility of a fluid has strong implications for its dynamics. It can be converted into fluid compressibility. The deviation is expressed as the compressibility factor. This deviation is expressed as a compressibility factor. Mach incorporates the above data including the compressibility factor. Experimental values for the compressibility factor confirm this. This yields a critical compressibility factor of 3/8. However, the negligible compressibility does lead to other phenomena.