1. Binding Energy: The strong force is responsible for holding the nucleons (protons and neutrons) together in the nucleus against the repulsive electromagnetic force between positively charged protons. The binding energy per nucleon, which represents the energy required to separate a nucleon from the nucleus, gives an indication of the strength of the strong force. On average, the binding energy per nucleon is around 8 MeV (mega-electron volts) for stable nuclei. This means that a tremendous amount of energy is required to overcome the strong force and separate nucleons.
2. Comparison to Other Forces: As mentioned earlier, the strong force is significantly stronger than the electromagnetic force at subatomic distances. The ratio of the strong force to the electromagnetic force is approximately 10^36, indicating that the strong force is about 10^36 times stronger. In contrast, the weak nuclear force is much weaker than both the strong and electromagnetic forces, with a strength ratio of approximately 10^-13 compared to the strong force. Gravity, on the other hand, is the weakest of the four fundamental forces, with a strength ratio of approximately 10^-43 compared to the strong force.
3. Range of the Strong Force: The strong force is a very short-range force. It operates effectively only over distances on the order of 10^-15 meters, which is approximately the size of an atomic nucleus. Beyond this distance, the strong force becomes negligible. This is why nucleons can be bound together within the nucleus, but the strong force is not felt at larger distances between atoms.
In summary, the strong nuclear force is an extremely powerful force that binds protons and neutrons within atomic nuclei. It is the strongest of the fundamental forces and dominates over the electromagnetic force at subatomic distances. However, its range is very short, limited to distances comparable to the size of atomic nuclei.
