Because of uncertainty about the physical significance of the hydrogen ion concentration, the definition of the pH is an operational oneâi.e., it is based on a method of measurement.
Topics: Entertainment âº Television âº Nickelodeon. Spongebob Squarepants first aired in the US on July 17, 1999. It aired in the UK on January 4, 2000 and in Japan on July 19, 2002. Login or Sign Up to answer this question.
May 1st, 1999 to be specific. I remember watching the countdown on nick from 8,7,6,5,4,3,2,1 and then the world turn the world upside down. The thing is ive watched spongebob episodes from 1997, so i dont know if it came out in 1999!