Final answer:
In aircraft, terminals are usually attached to wires through crimping. Grounding refers to fixing a conductor at zero volts by connecting it to the earth. In cars, grounding simplifies the wiring system by allowing the chassis to serve as a return path for electrical current.
Step-by-step explanation:
For general electrical use in aircraft, the acceptable method of attaching a terminal to a wire is by crimping, which allows for a durable connection that can withstand the vibrations and temperature changes common in aviation environments. When properly done, crimped connections maintain good electrical contact and provide mechanical strength without requiring solder, which can be prone to failure under the harsh conditions found in aircraft.
Grounding is related to this concept but is more specifically the process by which a conductor can be fixed at zero volts by connecting it to the earth with a good conductor. In the context of automotive systems, when one battery terminal is connected to the metal body, it allows the car chassis to act as a return path for electrical current, which simplifies the wiring system by requiring only one wire to supply current to electrical devices instead of two. This is because the metal body of the car essentially becomes part of the electrical circuit.