The natural gas that is piped to a residence or business is usually measured in units of volume called CCF. A CCF is 100 cubic feet of gas. The volume of a given quantity of gas depends on its temperature and pressure. It is essential to know these parameters when referring to a quanti...
This is the first of a series of papers on the ab initio calculation of the second, third, and fourth derivatives of the energy with respect to nuclear coordinates. The knowledge of these derivatives yields anharmonic spectroscopic constants. Here, we present efficient formulae for the analytic ...