see strength of materialsstrength of materials, measurement in engineering of the capacity of metal, wood, concrete, and other materials to withstand stress and strain. Stress is the internal force exerted by one part of an elastic body upon the adjoining part, and strain is the deformation or change in. ..... Click the link for more information.
The Koreans are believed to have originated from ancient China. This is gathered from the archaeological and linguist evidence.
The Jomon, the ancient people of Japan are thought to be related to people from Northern U.S., Canada, Florida, Virginia and Argentina, and believed to have come over from there 12,000 years ago.