Modern Usage
Three forms of the equivalence principle are in current use: weak (Galilean), Einsteinian, and strong.
Read more about this topic: Equivalence Principle
Famous quotes containing the words modern and/or usage:
“Families have always been in flux and often in crisis; they have never lived up to nostalgic notions about “the way things used to be.” But that doesn’t mean the malaise and anxiety people feel about modern families are delusions, that everything would be fine if we would only realize that the past was not all it’s cracked up to be. . . . Even if things were not always right in families of the past, it seems clear that some things have newly gone wrong.”
—Stephanie Coontz (20th century)
“...Often the accurate answer to a usage question begins, “It depends.” And what it depends on most often is where you are, who you are, who your listeners or readers are, and what your purpose in speaking or writing is.”
—Kenneth G. Wilson (b. 1923)