There are many more examples. Note that measuring each of these properties will not alter the basic nature of the substance. Examples of chemical properties are: heat of combustion, reactivity with water, PH, and electromotive force.
Mathematical fonts. In mathematical mode you can change the typefaces of the fonts when needed. For instance, it's customary to represent real numbers with a blackboard bold font, or topological spaces with calligraphic font. This article shows several fonts in math mode.
Starting today, we're rolling out a new font on http://t.co/zDdcbPwclU, moving from Helvetica Neue to Gotham. We primarily use the Gotham font family: elegant and direct, stylish but not exclusive, Twitter explained. Putting well-designed words in our product enhances the user experience..