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.
I'm trying to use the Raleway family of fonts in Word 2013/2010: http://www.google.com/webfonts/specimen/Raleway There are 9 weights in the family, e.g. Light, Book, Extra-Bold In Word, they show up