Physicists describe this interaction through the exchange of force-carrying particles called bosons. So, for example, a neutrino that strays close to a neutron can turn the neutron into a proton while the neutrino becomes an electron. This is the literal change of one type of subatomic particle into another. The weak force, also called the weak nuclear interaction, is responsible for particle decay. Fundamental forces of nature: The weak force And at the molecular and atomic levels, gravity has almost no effect relative to the other fundamental forces. Think of it this way: How hard is it to lift a ball off the ground? Or to lift your foot? Or to jump? All of those actions are counteracting the gravity of the entire Earth. Though gravity holds planets, stars, solar systems and even galaxies together, it turns out to be the weakest of the fundamental forces of nature, especially at the molecular and atomic scales.
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