This 3 sentence document provides a formula to calculate the thermal diffusivity (α) of a material by measuring the initial and final temperatures (T° inicial and T° final) at initial and final locations (long. Inicial and long. Final) over time. The thermal diffusivity is calculated by taking the difference between the final and initial location, divided by the initial location times the difference between the final and initial temperatures.

16.  = (long. Final – long. Inicial)long. Inicial x (T° final – T° inicial)