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What is Carbon Dating?
Explainer: what is radiocarbon dating and how does it work?
Click on the book images below for information on the content of the books and for information on ordering. Although the dock comprises a ramp and a platform, they will be only loosely connected with slack rope and eye bolts , and the buoyancy calculations for the platform are easy; it's the ramp that is giving me headaches. Specifically, one end of the ramp will be sitting on the shore and the other end will be supported by the plastic barrels. The ramp is T-shaped, with the lakeside end wider to accommodate the barrels. Although I've meant for this question to be somewhat general to allow for design modifications, I will mention that I've built part of the ramp already, with the walkway being 3' wide and 8' long, and the cross of the T being 5' wide and 3' long and covering two empty barrels; I'm willing to add another section with more barrels if needed. Any help in analyzing buoyancy of a T-shaped ramp with the narrow end resting on land would be greatly appreciated!
The term anno Domini is Medieval Latin and means "in the year of the Lord"  but is often presented using "our Lord" instead of "the Lord",   taken from the full original phrase " anno Domini nostri Jesu Christi ", which translates to "in the year of our Lord Jesus Christ ". This calendar era is based on the traditionally reckoned year of the conception or birth of Jesus, with AD counting years from the start of this epoch and BC denoting years before the start of the era. This dating system was devised in by Dionysius Exiguus of Scythia Minor , but was not widely used until after It is often directly contrasted to the more ancient, Anno Mundi AM conferring "in the years of the world" which recounts the ages based on biblical tradition beginning with the Creation account. To this day, it is firmly observed through virtually all Jewish religious sources, some minor non-Jewish orthodox societies, and is a reference in many aged and restituted manuscripts.
In history, archaeology and physical anthropology , the three-age system is a methodological concept adopted during the 19th century according to which artefacts and events of late prehistory and early history could be broadly ordered into a recognizable chronology. Thomsen , director of the Royal Museum of Nordic Antiquities in Copenhagen in office: , initially developed this categorization in the period to as a result of classifying the museum's collections chronologically - there resulted broad sequences with artefacts made successively of stone , bronze , and iron. The system appealed to British researchers working in the science of ethnology — they adopted it to establish race sequences for Britain's past based on cranial types.