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.
Hillenburg announced that he was putting the series on hiatus while he focused on the theatrical movie. At the time, no one knew if more SpongeBob episodes would be forthcoming. The movie, released on Nov. 19, 2004, was a popular and critical hit, and a fourth season was announced.