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.
SpongeBob SquarePants has featured the voices of Tom Kenny, Clancy Brown, Rodger Bumpass, Bill Fagerbakke, Mr. Lawrence, Jill Talley, Carolyn Lawrence, Mary Jo Catlett and Lori Alan since it began. Stephen Hillenburg started developing the SpongeBob concept into a television series in 1996 upon the cancellation of Rocko's Modern Life, which he directed.