Internal costs are easy to see and explain. They are costs that a business bases its price on. They include costs like materials, energy, labour, plant, equipment and overheads. External costs are costs that are NOT included in what the business bases its price on.
Answer: Alveoli
Explanation: Alveoli is the air sacs in the lungs through which oxygen and carbon dioxide diffuse into and out of the blood.
Molecules that have the same chemical formula but have different molecular structures are: Isomers.
Kinetic energy. Kinetic energy is the motion of waves, electrons, atoms, molecules, substances, and objects. Chemical energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy.
B: between a nonmetal and a metal.
