Scientists use a substance called iodine-131 to treat cancer. as iodine-131 undergoes radioactive decay and emits beta particles, it kill cancer cells. which fundamental force is being used in this type of treatment? strong weak gravitational electromagnetic

weak

Explanation:

The four fundamental forces are:

- Gravitational force: it acts between all of the objects that have a mass. Its effects are only relevant for very massive objects (such as planets, galaxies, stars..)

- Electromagnetic force: it acts between particles which have electric charge

- Strong nuclear force: it is responsible for holding together protons and neutrons inside the nuclei of the atoms

- Weak nuclear force: it is responsible for the radioactive decays of the nuclei and the particles

The situation described in the problem involves a iodine-131 nucleus which undergoes radioactive decay (more specifically, a beta decay). This type of decay is mediated by the weak nuclear force. In particular, in the decay of the iodine-131, a neutron decays into a proton and a W- boson (which further decays into an electron - antineutrino pair).

weak

Explanation:

current flows in a wire

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered