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.
A feature film, The SpongeBob SquarePants Movie complements the series, and received its premiere in theaters in the United States on November 19, 2004. In season five, the series' first television film, Atlantis SquarePantis, was broadcast for the first time on November 12, 2007 after a television marathon.