sites

https://www.tec-science.com/thermodynamics/temperature/richmanns-law-of-final-temperature-of-mixtures-mixing-fluids/

https://courses.lumenlearning.com/physics/chapter/14-2-temperature-change-and-heat-capacity/

https://tex.stackexchange.com/questions/81842/creating-a-drop-shadow-with-guassian-blur