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The force that causes attraction between magnets
The four forces that are the weakest
The theory which was developed by Newton, about how objects are related
The concept of atomic nucleus developed by Rutherford
The work on beta decay performed by Fermi
The meson hypothesis proposed by Yukawa
The unifying equations developed by Maxwell
The discovery of conduction of electric current through a magnetic field by Faraday
The Law, modified by Einstein, by adding time and removing instantaneous change
The force that effects the tides
The force that is responsible for all contact forces
The force that holds neutrons and protons together
The force associated with mass
The force that is responsible for beta decay
The force that holds the Earth in orbit
The force that is responsible for chemical reactions
The force that is associated with fission, fusion, and alpha decay
The strongest of the four forces
The force that can be attractive or repulsive