Which of these is a type of potential energy?

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.

If you want to create an electrical current, which situation would produce a solution capable of this

What causes most sediment to wash or fall into a river