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C-14 decays consistently over time, by estimating how much was in the sample to begin with and comparing it to how much is there now we can calculate how old the sample is.
We can get good estimates for how much C-14 was there before by comparing samples dated by other methods
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∙ 15y ago
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Is sodium C14-16 olefin sulfonate a sulphate?
No. it is sulfate free but I hear it can be irritating and drying as SLS but i have used it with no drying and irritation.
Could carbon 14 be used for dating rocks from the precambrian time?
NO. 1) Carbon is not a common component of rocks. 2) C14's half life is too short.
What is 14 degrees Fahrenheit in Celsius?
14 F = -10 C14 degrees Fahrenheit = -10 degrees Celsius14 degrees Fahrenheit = minus 10 degrees Celsius
Which situation is an example of equilibrium?
The amount of water in a cup does not change.
What is the carbon content of kerosene?
Kerosene is comprised of multiple types of alkane (hydrocarbon) chains. These chains can vary between 6 to 18 carbons long. Cycloalkanes and aromatics (benzenes) are among kerosene's hydrocarbon constituents.
Why can carbon-14 be used to date a 40000 year old tree but U-Pb cannot?
C14 is continuously made in the atmosphere by the effects of solar radiation on Nitrogen14. There is an equilibrium up there between how quickly C14 is made and how quickly it decays to C12 because the gases circulate. Obviously this circulation stops when a C14 molecule gets incorporated into a plant or something that ate the plant. Over time the C14 in a tree disappears while C14 in the iar keeps gettin renewed. Our dating technique relies on the difference between how much C14 is left in the tree compared to what can be found in the air. I dont think the same can be said of U. It and other heavy elements are not airborne and were in any case made in a dying sun. Therefore the ratio of Pu, U, Pb and other heavy elements is the same whether in a tree or in the soil that the tree grew up in. So while any U that found its way into the tree will have decayed, the U in the soil will have decayed too. Therefore our C14 (which relies on measuring differences) cannot be used. Full disclosure: I have MSc Molecular Biology but I am NOT an expert in carbon dating. Double check before you rely on this information as gospel.
What is the c-14 c-12 ratio used to date once living organisms?
It is because living organisms absorb C14 from their environment. After death, they are no longer capable of absorbing any more C14. So, at the time of death, the C14 : C12 ratio is fixed. C14 undergoes radioactive decay (into C12) so the C14 : C12 ratio declines and that can be used as a measure of the time since death.
How is carbon-14 used to date other materials?
I'd look up the wikipedia first. But here's a short answer. Carbon-14 is naturally found in the atmosphere in the form of heavy CO2. The reason for this has to do with neutron flux from the sun hitting nitrogen in the upper atmosphere - whatever. The concentration of heavy CO2 in the atmosphere is relatively stable. When a plant is alive, it takes up CO2 from the atmosphere and inevitably gets some heavy CO2 as well, and so it incorporates that C14 into its biomass. The concentration of C14 in the plant, as it is alive, stays in equilibrium with the concentration of C14 in the atmosphere. But when the plant dies, it stops respirating, and it stops taking CO2 in from the atmosphere. The C14 it does have in it continues to decompose according to a very predictable exponential decay rule. So ~14,000years after the plant dies, about half of its C14 has decayed. So you're a paleontologist 14,000 years from now, and you see a fossilized plant. You measure the amount of C14 in the plant, and you find that its concentration is about half the atmospheric level. Therefor you assume the plant died about 14,000 years earlier.
What is the difference between c 12 and c 14?
C12 and C14 are isotopes of the Element Carbon. C12 is the most abundant of all which is 99% of all the Carbon on earth while C14 is only 0.0000000001% (trace amount). C12 has a Atomic Number of 12. It has 6 Protons and 6 Neutrons. C14 has a Atomic Number of 14. It has 6 Protons and 8 Neutrons. C14 is radioactive in nature. It is used for carbon dating.
What are th uses of c14?
Carbon-14 is used for radioactive dating. Since its half-life is about 5000 years, it can be used a) to date items that contain a reasonable amount of carbon (especially remains of living beings), and b) up to a limit of about 50,000 years.
What are the release dates for C14 - 2013?
C14 - 2013 was released on: USA: 30 October 2013 (limited)
Is carbon dating is a type of technology currently used to study the past?
Yes, measurements of the ratio of carbon-14 (radioactive) to carbon-12 (nonradioactive) in a sample is used as a type of clock to determine the age of the sample. BTW, ever wonder why C14 dating works? Presumably, the organism is eating a constant proportion of C14 while it lives. So when it dies, the C14 is not being replenished. Sounds awful fishy to me, but what else is there? I would have like the process better if the organism were making C14 at a constant rate-- but alas, not so.
Can carbon dating be used on a stone to determine it's age?
It is not possible to carbon date rocks. Carbon 14 dating is based on the absorption of atmospheric carbon by livingthings. When the thing dies it no longer takes in carbon from the atmosphere through processes such as eating or respiration and levels of C14 in the body deplete due to the natural process of radioactive decay. By seeing how much C14 remains it is possible to see how long it has been since that animal died.However there are a range of other dating methods which can be used.
Explain the ''cup'' analogy used in the puzzle?
The c14 is significant to the survival of the aging never ending rats
How are the isotope carbon-12 and carbon-14 different from ech other?
The number of neutrons (and the fact that C14 is radioactive).
What formulas will give you the total value of a series of numbers displayed in column C from C1 to C14?
The simplest and best way is: =SUM(C1:C14)
Is sodium C14-16 olefin sulfonate a sulphate?
No. it is sulfate free but I hear it can be irritating and drying as SLS but i have used it with no drying and irritation.
