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.
Well, SpongeBob has a date of birth: July 14, 1986. If we assume that the series takes place in our times, that would make him 28. However, Bart and Lisa Simpson have been 8 and 10 for more than 20 years now. So if we assume that his age is constant in the show (which premiered in July 17, 1999), that would make him 13.