Welcome to Mrs. Young's calculus class blog! Each week, I will start a new post. Students, you can write questions for me or chat with each other about how to solve a particular problem. As part of your class participation grade each week, every student must comment at least once to my post or another student's comment. I look forward to spending this year with you. Enjoy!

Sunday, February 12, 2012

Happy Valentine's Day!

Happy Valentine's Day this week! We are going to finish up section 6.4 this week, which is all about exponential growth and decay, half-life, and carbon-14 dating. It is an application of our separable differential equations. It is really cool! Watch the video to the right and explain in your own words anything that you know about carbon-14 dating.
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13 comments:

  1. aiden wangFebruary 12, 2012 at 3:47 PM

    C-14 is made by N2 which stroke by a positive parical. I remember that the C14 dating is based on the fact that the amount of C14 stays in a certian number because of the breathing motion. once the living things died, the amount will go down. (I'm aure about this)so the metherd can only be used on living things which have breathing motion. (I'm not sure about this)

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    Replies
    1. aiden wangFebruary 13, 2012 at 7:21 PM

      hey guys check this out.
      1)take your calculator out
      2)press'mode',set'Graph'into'POLAR'
      3)press'ENTER'
      4)press the yellow bottom then 'F1'
      5)type in'r1(θ)=2(1-sin(θ))'
      6)press the yellow bottom again then press'F2'
      and here comes a little bit different
      singles!
      you set like this:
      'θmin=-(@/2)
      θmax=(@/2)
      θstep=@/180
      xmin=-10.
      xmax=10.
      xscl=1.
      ymin=-4.
      ymax=4.
      yscl=1.'
      and the others!
      you set it like this:
      'θmin=-@
      θmax=@
      θstep=@/180
      xmin=-10.
      xmax=10.
      xscl=1.
      ymin=-4.
      ymax=4.
      yscl=1.'

      ok. and let it graph it! what's that?!
      happy valentine's day!

      Delete
    2. Mrs. YoungFebruary 14, 2012 at 7:01 AM

      This is cool Aiden. Students, use the second window setting that Aiden typed and instead of the @ symbol, it should be pi.

      Delete
  2. Caroline KangFebruary 12, 2012 at 6:00 PM

    Carbon-14 dating is method for measuring age of materials such as bones, clothes, woods. C-14 decays with years about 6000 years(?). I dont know many things about c-14 dating.

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  3. Anna SchrammFebruary 13, 2012 at 12:36 PM

    Like Caroline, I do not know many things about Carbon-14 dating. I have heard that it is not very accurate, and you measure the amount of carbon in an object to determine how old it is.

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  4. Krista WoodFebruary 15, 2012 at 4:21 PM

    Like both Anna and Caroline, I don't know hardly anything about Carbon-14 dating. Carbon 14 dating is used to help find the age of something by measuring the amount of carbon in it.

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  5. Alexa SpudieFebruary 17, 2012 at 4:07 AM

    I agree. I've heard carbon 14 dating is not very accurate either. You use the percentage of carbon left to figure out how old the object. That's about all I know :P

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  6. Ukbin KwonFebruary 17, 2012 at 4:54 AM

    I also agree with everyone. I also do not know much about Carbon-14 dating. I am guessing that it helps when finding the age of object.

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  7. AnonymousFebruary 17, 2012 at 4:54 AM

    You use carbon 14 dating in order to date something using how much the carbon the object has.

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  8. Elizabeth WhippleFebruary 17, 2012 at 5:31 AM

    I dont really know anything about carbon 14.. You can use the percentage of carbon left to see that age of something but im not sure what else it is for

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  9. Alicia WhaJung HanFebruary 17, 2012 at 6:47 AM

    It is element to calculate how old object is by using element's specific half-life. Element reduces to half of the original as specific times passed.

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  10. christiankFebruary 17, 2012 at 9:46 AM

    I just know that carbon 14 is an estimation based on the speed of decay. I hear its not too accurate.

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  11. AnonymousFebruary 17, 2012 at 11:59 AM

    I agree everyones'， I think we can use it for Archeology and also resemble legical medical expert for any cause， science give us convinience , Chinese constantly consist a proverb , as knowledge is power !

    ReplyDelete

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