Carbon Cycle Chemical Reactions Involved: Photosynthesis: Air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a by product. During photosynthesis plants use carbon dioxide and produce oxygen.
Similar to shore power for ships, a ground power unit (GPU) may be used to supply electric power for an aircraft on the ground, to sustain interior lighting, ventilation and other requirements before starting of the main engines or the aircraft auxiliary power unit (APU).
electrical system. The Master Switch (labelled MS) causes the electrical system to connect the electrical buses and devices to the battery. The battery provides the power to crank the starter. Once the engine is running, power is supplied by the alternator and the battery is recharged.