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.
In the episode Christmas Who? that first aired December 6, 2000, SpongeBob showed a copy of his birth certificate that showed his birth date as July 14, 1986. Since the first SpongeBob episode aired on May 1, 1999, we can conclude that the birth certificate did not refer to his creation as a cartoon. Therefore, in the Christmas Who? episode, SpongeBob would have been 14 1/2 years old.