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).
DC relays consist of wire wound on a bobbin, which is placed over a ferromagnetic core. A hinged contact assembly is positioned over the core (Photo 1). When current is applied to the coil, flux is induced in the ferromagnetic core, causing the contacts to close.