What is the name of the carbon isotope used in radioactive dating of artifacts

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Ice-coring projects in the ice caps of Greenland and Antarctica have yielded data going back several hundred thousand years, överyears in the case of the EPICA project. The trapped air has proven a tremendously valuable source for direct measurement of the composition of air from the time the ice was formed. Layering can be observed because of seasonal pauses in ice accumulation and can be used to establish chronology, associating specific depths of the core with ranges of time. Changes in the layering thickness can be used to determine changes in precipitation or temperature. Water molecules containing the heavier O evaporate at a higher temperature than water molecules containing the normal Oxygen isotope. The ratio of O to O will be higher as temperature increases.

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In four scientific papers, this thesis investigates the processes, in terms of movements of individuals, that have produced, reproduced and transformed patterns of residential segregation in Swedish cities between and

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Department of Physics

Testa om du är vass nog att klara ett urval av frågorna från årets kvaltävling i Teknik-SM. Kvaltävlingen gick till så att varje lag fick tre timmar på sig att lösa så många som möjligt av de 32 problemen. Till sin hjälp hade varje lag tillgång till en dator med internetuppkoppling. Kvaltävlingen genomfördes i oktober på högskolor och universitet runt om i Sverige.

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