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The term is most commonly used in relation to atoms undergoing radioactive decay, but can be used to describe other types of decay, whether exponential or not.

One of the most well-known applications of half-life is carbon-14 dating.

So, if you're trying to use his to date dinosaurs, just stop.

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It is incorporated into plants through photosynthesis, and then into animals when they consume plants.

The carbon-14 undergoes radioactive decay once the plant or animal dies, and measuring the amount of carbon-14 in a sample conveys information about when the plant or animal died.

IC and ERV are not measured as part of spirometry but the position of the tidal loops gives at least a general indication of their magnitude and I’ve noticed that there’s a moderately good correlation between BMI and the position of the tidal loop.

With this in mind, I see up to a dozen reports a week with restrictive-looking spirometry (i.e.

Interpreting these kinds of spirometry results is always problematic, particularly when there are no prior lung volume measurements to rule-in or rule-out restriction.

I’ve noticed however, that patients with a restrictive spirometry pattern almost always have the tidal loop on the far right-hand side of the flow-volume loop (zero or near zero ERV).Scientists use a technique called radiometric dating to estimate the ages of rocks, fossils, and the earth.Many people have been led to believe that radiometric dating methods have proved the earth to be billions of years old.Now one thing that it's important to keep in mind about carbon dating is that this is a really small number. The abundance, the natural abundance is already very small. You can usually date something that's under about 40 or 50,000 years old using this technique. So if something's been dead for longer than a few carbon 14 half lives, there's not enough carbon 14 left to measure it accurately enough to really say for sure how long the thing's been dead. This has caused many in the church to reevaluate the biblical creation account, specifically the meaning of the word “day” in Genesis 1.

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