Which of the following is a part of the geocentric model?

a. all objects in the universe are perfect spheres.

b. all objects in the universe move around the sun.

c. all objects in the universe revolve around earth.

d. all objects in the universe move in random patterns.

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.