Relativism in philosophy first recorded 1865 (relativist is from 1863).
of referre "to refer." Meaning "person in the same family" first recorded 1657; the adj. Relatively "in relation to something else" is recorded from 1561.
Radiocarbon dating can be used on samples of bone, cloth, wood and plant fibers.
I might be said to be without a friend, or relative, in the world. He was another friend, and even a relative, of the "illustrious master." Have you heard him speak of late of any relative of mine or his, called Pecksniff?
To her, the relative importance of the farm to Billy was as simple as a problem in addition.
is a technique used by scientists to learn the ages of biological specimens – for example, wooden archaeological artifacts or ancient human remains – from the distant past.
It can be used on objects as old as about 62,000 years.
Archaeologists use the exponential, radioactive decay of carbon 14 to estimate the death dates of organic material.
The stable form of carbon is carbon 12 and the radioactive isotope carbon 14 decays over time into nitrogen 14 and other particles.Atoms of the same element that have different numbers of neutrons are called isotopes. Most carbon on Earth exists as the very stable isotope carbon-12, with a very small amount as carbon-13.Here’s an example using the simplest atom, hydrogen. Carbon-14 is an unstable isotope of carbon that will eventually decay at a known rate to become carbon-12. Development of this process was aided by German chemists Otto Hahn and Fritz Strassmann, who later went on to discover nuclear fission in December 1938.The utility of the rubidium-strontium isotope system results from the fact that Sr with a half life of 48.8 billion years.Each of these minerals has a different initial rubidium/strontium ratio dependent on their potassium content, the concentration of Rb and K in the melt and the temperature at which the minerals formed.