Final answer:
Planes avoid collisions by adhering to FAA regulations, maintaining horizontal and vertical distances from other aircraft, similar to restrictions on electron positions in quantum mechanics.
Step-by-step explanation:
The reason planes are able to fly without running into each other is due to the strict regulations set by the Federal Aviation Administration (FAA). Each aircraft must adhere to specific rules that ensure a safe distance from one another. When flying at the same altitude, a plane must keep a distance of five miles from other aircraft, while also maintaining a vertical distance of 2,000 feet above or below another aircraft. This separation decreases to 1,000 feet if both aircrafts are flying below an altitude of 29,000 feet. These safety measures reflect a principle similar to the quantum mechanics concept where electrons have defined restrictions on their locations.