infirm force, a fundamental force of temper that underlies some forms of radioactivity, governs the decay of unstable subatomic particles such as mesons, and initiates the nuclear fusion reaction that fuels the Sun. The easy force acts upon every(prenominal) cognise fermionsâ€"i.e., elementary particles with half-integer values of intrinsic angular momentum, or spin. Particles interact through the listless force by exchanging force-carrier particles known as the W and Z particles. These particles are heavy, with masses just about 100 times the mass of a proton, and it is their heaviness that defines the exceedingly short-range nature of the weak force and that makes the weak force appear weak at the low energies associated with radioactivity.
The effectiveness of the weak force is confined to a distance range of 10?17 metre, about 1 percent of the diameter of a typical atomic nucleus. In radioactive decays the strength of the weak force is about 100,000 times less than the strength of the electromagnetic force. However, it is now known that the weak force has intrinsically the alike strength as the electromagnetic force, and these two apparently diaphanous forces are believed to be different manifestations of a unified electroweak force.
close subatomic particles are unstable and decay by the weak force, even if they potbellynot decay by the electromagnetic force or the strong force. The lifetimes for particles that decay via the weak force vary from as little as 10?13 second to 896 seconds, the retrieve life of the free neutron. Neutrons bound in atomic nuclei can be stable, as they are when they fall out in the acquainted(predicate) chemical elements, but they can also give overture through weak decays to the type of radioactivity known as beta decay. In this case the lifetimes of the nuclei can vary from a thousandth of a second to millions of years. Although low-energy weak interactions are feeble, they occur frequently at the heart of the Sun and other stars where both the temperature and the density of...If you want to get a full essay, collection it on our website: Orderessay
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