PHYSICS 20E Lecture Notes - Lecture 13: Adenosine Diphosphate, Light-Independent Reactions, Chemical Energy
Document Summary
All life requires a way to harness energy from its environment. It takes twice as much energy to lift a weight twice as high. Coal burned under a vat of water to make steam. Steam pushes pistons, attached to wheels, moves the train. Chemical energy in coal is converted into kinetic energy of the train (energy of motion) Balls is falling down with ke, falls on spring, ball transfers ke into pe of spring, spring pe transferred back to ke of ball. Expect ball to be moving more slowly than it was initially, some energy is lost via heat and friction (the spring isn"t 100% friction) Nature has figured out a way to make chemical batteries. Adp - adenosine diphosphate partially charged battery. Atp - adenosine triphosphate fully charged battery. Chloroplasts - subunits in plant and algae cells. Chlorophyll is a green pigment in chloroplasts.
