When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects? | AskScience Blog

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Monday, January 11, 2021

When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects?

When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects?


When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects?

Posted: 10 Jan 2021 10:57 AM PST

Would donating plasma post vaccination help someone as much as donating post infection? I recently received my second jab, and would like to donate whole blood or plasma after a couple of weeks. Do you think that my blood or plasma could be used to treat a patient with severe covid?

Posted: 10 Jan 2021 01:06 PM PST

Does a Molten Salt Nuclear Reactor require a heat sink such as a large body of water like a river or lake? If a Molten Salt Type does require water as a heat sink, does it use more or less water than other types of fission reactors?

Posted: 10 Jan 2021 09:15 PM PST

Are you allowed to have sex after getting a Covid Vaccine?

Posted: 10 Jan 2021 08:55 PM PST

My boss mentioned that he isn't getting the vaccine because of XYZ. One thing he mentioned, which stuck out to me, was that you aren't allowed to have sex for 29 days. I tried asking him why but wasn't able to give an answer. I googled it for a while and didn't find anything. Is there any truth to this?

submitted by /u/Kwkyo
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What would happen if a positron encountered a negative muon?

Posted: 10 Jan 2021 07:01 PM PST

As is common knowledge among the physics community when positrons encounter electrons they mutually annihilate each other into two high-energy gamma rays. Though what would happen if a positron encountered a negatively charged muon? Seeing as though they have opposite charges you would expect the same result. However, what would be leftover looking at how the muon is 207 times more massive than an electron? Would the new particle only be 206 times "heavier" than an electron? Would it now have a neutral charge? Would the particle still be short-lived and unstable like ordinary muons? If yes, what particle would it decay into? Why?

submitted by /u/Dumbustafa1
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Would it be possible or practical to simulate potential mutations in SARS-CoV-2 in order to discover and anticipate new variants?

Posted: 10 Jan 2021 02:38 PM PST

I've heard of projects simulating protein folding from DNA, and I understand some of a virus' abilities come from the proteins encoded in its RNA. Are we able to compute virus properties and activity from arbitrary RNA?

submitted by /u/anonymous_coward
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Do new viruses ever spread across the world without people noticing?

Posted: 10 Jan 2021 12:56 PM PST

COVID-19 is deadly. But what if it weren't? What if there were a similarly infectious condition that didn't cause serious health effects? How would we even notice it? I read the book Germs years ago and was surprised at how long it took to identify outbreaks of serious disease. So is it possible that there are less deadly novel viruses that spread around the world and aren't noticed?

submitted by /u/TrueBirch
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Is it possible to transfer a vaccine through bodily fluid?

Posted: 10 Jan 2021 09:23 PM PST

I just had a thought. Vaccines are dampened or harmless versions of viruses right? So could those be transmitted through bodily fluids, sexually, sharing needles etc? not saying I'm going to do it, I'm just curious.

submitted by /u/gogetmymoneyclip
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Any evidence on the safety of COVID long-haulers receiving the vaccine?

Posted: 10 Jan 2021 09:13 AM PST

I was wondering if anyone with knowledge of the Pfizer/Moderna vaccine had thoughts on if people who have already had COVID and have long-term symptoms would be safe getting the vaccine? Or if there are any potential downsides? Is it worth taking the chance?

submitted by /u/thewrongrecroom
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Are there corresponding HSV/RGB values to natural pigments? (Carotenoids, chlorophylls)

Posted: 10 Jan 2021 12:30 PM PST

Are there corresponding HSV/RGB values to natural pigments? (Carotenoids, chlorophylls).

submitted by /u/nojobnoproblem
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I’ve always seen these fun videos on YouTube about interesting science experiments and I’ve come across one that shows people making near-unbreakable glass “teardrops,” called, Prince Rupert’s Drops. Why do these drops take so much pressure to break?

Posted: 09 Jan 2021 07:58 PM PST

Is there any reliable information as how effective the Chinese Coronavirus Vaccine is?

Posted: 10 Jan 2021 01:57 AM PST

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