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weak force

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weak force

 or weak nuclear force

Fundamental interaction that underlies some forms of radioactivity and certain interactions between subatomic particles. It acts on all elementary particles that have a spin of ¹⁄₂. The particles interact weakly by exchanging particles that have integer spins. These particles have masses about 100 times that of a proton, and it is this relative massiveness that makes the weak force appear weak at low energies. For example, in radioactive decay, the weak force has a strength about 1/100,000 that of the electromagnetic force. However, it is now known that the weak force has intrinsically the same strength as the electromagnetic force, and the two are believed to be only different manifestations of a single electroweak force (see electroweak theory).



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The Boulder team monitored a "twinge" of weak force in atoms, which are otherwise governed by the electromagnetic force.
Neutrinos interact with things through the weak force, but back during the big bang, when things were hotter, that force might have done a lot more than it does now.
Supersymmetry Many physicists believe that deep down, all the forces of nature are linked, including gravity, electromagnetism, the strong force – which binds the constituents of atomic nuclei together – and the weak force – which governs radioactive decay in stars.
 
 
 
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