听力原文:Listen to part of a lecture in an archaeology class.Professor: In our last class, we discussed technologies, like radio carbon dating and digital imaging, that help us interpret archaeological evidence, We looked at some of the challenges of drawing conclusions from the available evidence...
Why is carbon-14 used in radiocarbon dating? Why does radiometric dating start when rock is formed? Why is radiocarbon dating only rarely applied in geological work? How are fossils dated using radiometric dating? Why is zircon used for radiometric dating? Why are igneous rocks used for radiomet...
"Construction trades carry some significant weight here," said author, lobbyist, and law professor Chris Micheli, who is widely considered an expert on the inner workings of California's Capitol. He does not lobby for oil or labor. Micheli notes that the trade union represent...
In 1991, high in the mountains of Europe, hikers made a shocking discovery: a dead man partly frozen in the ice. The police investigation soon became a scientific one. Carbon dating indicated that the man died 5, 300 years ago. Today, he is known as the Iceman and ...
How do Fireworks Work? What is Graham’s Law? Combustion and the Colour of Smoke Fun with Carbon Dioxide Difference between Electrolysis and Electroplating Who discovered Penicillin? Why does Cake Rise? What is Nitrogen Cycle? What is Boyle’s Law?
Alpha Decay: Alpha decay describes a nuclear manner through which the nucleus of an atom releases an alpha particle. The nucleus contains protons and neutrons, with some number of electrons in orbit around it. If these electrons are somehow disturbed, then they will fall into the nucleus, where...
Using this exact technique (waiting until exactly half of the sample has decayed and then marking that time as the half-life), won’t work for something like Carbon-14, the isotope most famously used for dating things, since Carbon-...
1940 –Martin KamenandSam Rubendiscovercarbon-14. However, it was Willard Libby who discovered the use of this isotope in dating, and for that he won the Nobel Prize in Chemistry in 1960. 1943 –The Holocaust: InBerlin, theGestapoarrest 1,800 Jewish men with German wives, leading to theRo...
at least to some extent. What science seeks that mātauranga Māori does not is an additional layer of understanding: causal explanations based on theories of mechanism. This is the difference between science and technology. The latter just needs to work. We don’t necessarily need to know why...
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