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).
You can also pull out a relay (one at a time) and place a temporary wire jumper inside the relay socket across terminal 87 (the +12DC input voltage source) and terminal 30 (the outgoing wire to the trim/tilt pump motor) to make the motor run.