Mohr is a term that can refer to various concepts, but it is often associated with the Mohr circle in engineering and materials science. The Mohr circle is a graphical representation used to analyze stress and strain in materials. It helps engineers visualize how different forces affect a material's internal structure, making it easier to predict failure points. In a different context, "Mohr" can also refer to the Mohr's salt, a chemical compound used in various applications, including as a reagent in laboratories. It is a double salt of ammonium sulfate and ferrous sulfate, often utilized in analytical chemistry for its properties in redox reactions.