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 was created and designed by cartoonist and marine biologist Stephen Hillenburg, who began developing the show shortly after the cancellation of Rocko's Modern Life in 1996. Hillenburg intended to create a series about an over-optimistic sea sponge living in an underwater town. Hillenburg compared the character's personality to Laurel and Hardy and Pee-wee Herman. As he drew the character, he decided that a squeaky-clean square like a kitchen sponge fit the concept.