What is half-life in terms of radioactive decay? What is the length of decay of carbon-14? What is carbon-14 dating? How do we know the half-life of carbon-14? What is the half life of U-238 for alpha decay? What atom does carbon-14 decay to? What is the half-life...
In response to a changing global situation and the expectations of the international community, and with the future and overall interests of humanity in mind, China proposed the Belt and Road Initiative (BRI). Committed to the Silk Road spirit, a great heritage of human civilization, the BRI c...
The Earth is like our mother.She gives live to all the living things on the Earth.And she provice us with air、food、water and other things we need for living.Once she was beautiful ahd rich.But mow she is crying, becacuse she is becoming dirtier and dirtier, poorer and poorer. It'...
An ancient bone contains 69 g of carbon and has a decay rate of 45 counts/min. Given carbon-14's half-life is 5,730 years, how old is it? (Assume that the ratio of isotopes in the atmosphere is 14C/12C = 1.3 10 12 and has remained constant. The ratio of t ...
相关知识点: 试题来源: 解析 【答案】D【核心短语/词汇】energy:能源【翻译】——低碳生活是什么样子的?——节约更多的能源,产生更少的二氧化碳。【解析】more为更多的,less为更少的。energy和carbon都属于不可数名词,根据句意可知答案为D。 反馈 收藏
1一What’ s the low-carbon (低碳的) lifestyle like?一Save energy, produce carbon. A. more; more B. less; more C. less; less D. more; less 2—What’s the low-carbon(碳) life style like?—Save___energy, produce___ carbon. A. more; more B. less; more C. less; less D....
I hope it can come into being in our daily life as soon as possible. 保护环境的倡议书英语作文 篇2 There is a need for us protection of the environment.We can do a lot of things.Firstly, we can use more cloth bags instead of use plastic bags.Secondly, We should walk much, use ...
The half-life of Sr-90 is 29.1 years. How many years would it take for a 1.0g sample of Sr-90 to decay to 0.25g? The half-life of carbon-14 is 5730 years. A radioactive carbon sample has mass =1.55 times 10^{-3} g. H...
Carbon-14 is a type of radiometric dating. Carbon-14 decays into nitrogen-14 at a rate of about half the sample every 5,730 years (the...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homework...
1一What’ s the low-carbon (低碳的) lifestyle like?一Save energy, produce carbon. A. more; more B. less; more C. less; less D. more; less 2—What’s the low-carbon(碳) life style like?—Save___energy, produce___ carbon. A. more; more B. less; more C. less; less...