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.
The series officially premiered on July 17, 1999. It has received worldwide critical acclaim since its premiere and gained enormous popularity by its second season. A feature film, The SpongeBob SquarePants Movie, was released in theaters on November 19, 2004, and a sequel was released on February 6, 2015.
Post-Movie Era (2005-present) TV advertisements for SpongeBob's fourth season first aired publicly during the 2005 Nickelodeon Kids' Choice Awards. The new episodes began airing on May October 3, 2003. The first new episode of Season 4 was Fear of a Krabby Patty/Shell of a Man.