If an atom has 3 energy levels, how many sublevels should it have

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

What does the cell nucleus do or, how does it function?

When would a bouncy ball have the most potential energy