Which of the following statements is true? running an electric current through a magnet can create a magnetic field. electric engines change electricity into magnetism. the strength of a magnetic field increases with distance. electrons are found in the nucleus of an atom.

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.

What forms when chemical reactions combine pollution with sunlight?

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins