Answer:B
Explanation: Because you know how the is potential energy and then there is kinetic energy yeah those have to do with movement like a roller coaster
PH = -log10 [H+]. So anwer 2 pH
Nitrogen is 5 valence electrons
oxygen is 6 valence electrons
fluorine is 7 electrons
Adults have stem cells because they are needed to repair certain tissues in the body such as in the muscles, bone marrow, skin, teeth, heart, and liver, to name a few. Thus, they can develop into many different cell types and function to replace older and damaged tissues.
