IUPAC Green Book[3] in that, in terms of its definition [4], pH = âlg a. H. it involves a single ion quantity, the activity of the hydrogen ion, which is immeasurable by any ther-. modynamically valid method and requires a convention for its evaluation.
He began developing SpongeBob SquarePants into a television series in 1996 upon the cancellation of Rocko's Modern Life, and turned to Tom Kenny, who had worked with him on that series, to voice the title character.
Facebook however, actually started out in theory on October 23, 2003 when Zuckerberg launched Facemash.com. Facemash allowed visitors (basically his Harvard classmates) to compare two student pictures side-by-side to let them decide who was hot and who was not.