(3) Here’s another case–that of the die-away curve (p. 156). Find the area between and , of the curve (Fig. 57) whose equation is
The integration (p. 201) gives
Fig. 57.
Fig. 58.
(4) Another example is afforded by the adiabatic curve of a perfect gas, the equation to which is , where stands for pressure, for volume, and is of the value (Fig. 58).
Find the area under the curve (which is proportional