> as lemmas

1972 Jrnl. Acoustical Soc. Amer. 52 992/1 Stallard has determined the density p as a function of temperature and pressure..where T is temperature in degrees Celsius, and p is pressure in mega pascals.

1991 Amer. Scientist Mar. 147/2 For iron-based materials each degree of temperature difference between two regions sets up a thermal stress of 3.5 megapascals, or 500 pounds per square inch.