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).
The red wire on the left brings power to the horn relay from the main splice. The red wire on the right, with the black fusible link, feeds power to the fusebox, through the bulkhead connector. With the exception of things fed directly from the main splice, ALL the electrical power in your car passes through here.