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Author Topic:   Radioactive carbon dating
crashfrog
Member (Idle past 1496 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 77 of 221 (396179)
04-19-2007 12:16 AM
Reply to: Message 71 by Juraikken
04-19-2007 12:07 AM


You're not making any sense, JJ.
how can you say it doesnt matter at all?
Because it doesn't. And you'd only think that was weird if you didn't know what radioactivity was. Which you clearly don't.
some say at the beginning stages of Earths creation, there were NO atmosphere for a while
Yes. And there was nothing alive at that period in the Earth's history, because it was before the evolution of living things.
There are no fossils from a time when the Earth had no atmosphere, because life could not exist under those circumstances. If that had ever happened in Earth's past after the evolution of life, the Earth would be lifeless, today. (And it's not.)
if you were to fall in a volcano and millions of years later your bones be exposed to people, you think they woudlnt know at all that you were burned?
That's not how fossilization works. If you were to fall into a volcano, there wouldn't be any bones to find.
i thought that the c-14 dating actually has that carbon CLOCK running after the thing dies, so basically it IS amount really.
No, it's proportion. Maybe you should look up how radioactive decay works? It proceeds in a geometric progression, which we measure as a "half-life." (You've heard that term before, right?)
depending on the atmosphere and where he died, he coulda had a c-14 disease in his body that could have depleted the c-14 in his body before he died THUS giving it a LARGER age than its suppose to have...
There's no such thing. Seriously, there isn't.
now lets say this thing died because of that, are you to say WE as scientists wouldnt know this?
No, we'd know. But it wouldn't have any effect on radiometric dating.
decay of isotopes means the amount that is given off?
No, that's not what it means. It means "the proportion of the isotope to its decay product." It's about proportion.

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 Message 71 by Juraikken, posted 04-19-2007 12:07 AM Juraikken has not replied

  
crashfrog
Member (Idle past 1496 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 94 of 221 (396782)
04-22-2007 1:22 AM
Reply to: Message 92 by ArchArchitect
04-21-2007 9:44 PM


Re: Question:
So then the amount of heat is directly proportional to the speed of the atoms?
No more than your height is "directly proportional" to the number of inches between the bottom of your feet and the top of your head.
Like I said, you need to refresh your memory on the kinetic theory of gases. It's the model that explains (among other things) why most materials expand when they get hot.

This message is a reply to:
 Message 92 by ArchArchitect, posted 04-21-2007 9:44 PM ArchArchitect has not replied

  
crashfrog
Member (Idle past 1496 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 102 of 221 (407010)
06-23-2007 11:43 AM
Reply to: Message 97 by WS-JW
06-23-2007 1:52 AM


Science could be described as a process that finds truth by excluding falsehood. In other words it's not so much that we find out what models are true, it's that we eliminate the models that are false.
If we allow supernatural explanations - which can be anything at all - how could we possibly do that? How can any "supernatural" model ever be rejected? You believe in God; but what about the people who believe in fairies? From what basis could we tell them that they were wrong? If the fairie-supporters can just make up any explanation they require, how can we possibly ever decide that they're wrong?
Intelligent people realize that just making things up and believing them is not generally a path that leads to truth. But human imagination is the source of all "knowledge" about fairies, God, and everybody else held to be "supernatural." Reasonable people shouldn't have to be told that the reason science rejects the supernatural is because it's impossible to know anything about it - the only thing you can do is make up stuff about it. Who would possibly mistake that process for one of truth-finding? The way you find out what's under your bed isn't to make up stories about monsters and boogeymen. The way you find out is to bend down there and look.

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crashfrog
Member (Idle past 1496 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 109 of 221 (407168)
06-24-2007 8:10 PM
Reply to: Message 108 by fooj
06-24-2007 6:38 PM


Re: A response to various criticisms
The Common Sense Science atomic model is based on the assumption that electrons and protons don't have entirely positive and entirely negative charges.
Which is basically a physical impossibility. The behavior of electrons and protons is based on their net charges, which we can and have measured. For instance, if one electron has a charge of e- (and a proton p+), it doesn't matter if it's actually a mixture of, say, 2e- and 1p+; its net charge would be e-, and its behavior would be based on that.
Unless you propose that they're made of equal negative and positive charges (which we know they're not), any kind of net charge imbalance would leave the same problem Rutherford had to explain - the concentration of protons in the nucleus would make the nucleus fly apart from electrostatic repulsion if not for the strong nuclear force.
Like charges repel. That's a basic law of nature.
Not impossible if charges aren't total positive or total negative.
Yes impossible. We know from Rutherford's alpha scattering experiments that atoms have a nucleus where protons and neutrons reside. There's no such thing as being "not total positive or negative" for something that small. Either electrons and protons have a net charge, or they don't. Since they behave as charged particles, we know that they do.
This is because it has a half-life triple point of 1000 days.
...what? "It" what? Neither potassium or argon are radioactive, and triple points are measured in degrees/pressure. And potassium's half-life is nearly 1 billion years.
So I'm not exactly sure what you're trying to say.

This message is a reply to:
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