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Everything posted by EvoN1020v
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Know what? Our tongues can be pretty tricky because the receptors are chiral. You know anything about it? Our tongue have dextrorotatory and levorotatory so sometime there are same molecules, but we taste them differently. I don't know why I'm telling you this, but you wanted the "exact mechanism behind the tongue receptors".
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Awesome chemistry question - you try it out yourself
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
You are using the ICE method' date=' very good. But you have an error in your calculation, because you know that the "change" for [ce']PbCO3[/ce] is -1.4999 x 10^5, therefore it should be positive over the other side. Your reply was –(1.4999 x 10-5 ). It should be positive. Also, please use "^" for exponents. I don't want to get confused. Secondly, what does "dm3" means? -
Awesome chemistry question - you try it out yourself
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
The question requested for the mass of [ce]Na2CO3[/ce] not [ce]PbCO3[/ce]. -
Yeah dave. It is the basically same thing! Because you will need to have -45 degree or -(pi/4) + 60 degrees or (pi/3) to make +15 degrees. Therefore then do all the works.
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Awesome chemistry question - you try it out yourself
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
You misunderstood for 3 reasons: (1)The solution is being injected - meaning the solution is in a needle and being put in the arm or something like that. (2)The precipitate will form inside her body, not in the mouth!! (3)It won't be too much precipitate enough to kill her. So jdurg the Chemistry Expert.. Do you have an answer for my question yet?? -
Yeah it's a great possibility, because my bedroom is upstairs, and the fusebox/breaker box is 2 floors below in the basement. So I am guessing that there are only 1 common wires to join all my outlets in my bedroom.
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Come on guys you got to be more open minded, there are tons of hypthosis that you can think of. So my theory of this, is that the copper elements form with a chemical in the cigarette to form a precipitate. The precipitate would land on your tongue and give you the sweet taste (aromatic rings). Oh bingo! I just looked at the "Solubility of Ionic Compounds" Table. I looked below at the low solubility which is <0.1 mol/L at SATP. Copper form with Chlorine would form a precipitate, along with bromine and iodine elements. [ce](CuCl2)[/ce]. Hope this helps you abit.
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DUH. You're right about the cos function. I just completely forgot that it's an even function. Ok can you provide your "Now switch pi over 4 and pi over three so you get -pi over 12... you'll get the same answer!" in equations? I don't really understand where you are talking about. Thanks
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You are a physician in an emergency ward. A girl has entered respiratory collapse due to chewing on wood covered with a lead-based paint. Tests have shown [ce]PB^2+[/ce] in her blood to be 1.5 x 10^-5 mol/L. Reports have shown that [Pb] > 1.0 x 10^-9 can be considered lethal. To quickly reduce [Pb] to 1.0 x 10^-9 mol/L you have decided to inject a [ce]Na2CO3[/ce] solution directly into her blood so as to cause a [ce]PBCO3[/ce] precipitate to form [ce]K_sp = 3.3 x 10^-14)[/ce], which can be filtered from the blood by her kidneys. If her body contains 1.7L of blood, what mass of [ce]Na2CO3[/ce] is required to precipitate the Pb from her blood and bring [Pb^2+] down to 1.0 x 10^-9 mol/L. Since [ce]Na2CO3[/ce] is lethal in large amounts you must not administer an overdose!! So figure it yourself, and post your answer. I'll figure it out myself first, then we can discuss more later.
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I completely disagree with you dave. \cos \frac{-\pi}{12} does not equal to \cos \frac{\pi}{12}. To get \sec\frac{-\pi}{12}, you should have 45 degrees subract 60 degrees which would equal to minus 15 degrees. (-15 or \frac{-\pi}{12}). To change \sec, you have to get \frac{1}{\cos}. Therefore, \frac{1}{\cos}(\frac{\pi}{4} - \frac{\pi}{3}) Expanding the \cos subractive trig identity: \frac{1}{\cos}(\cos\frac{\pi}{4}\cos\frac{\pi}{3} + \sin\frac{\pi}{4}\sin\frac{\pi}{3}) \rightarrow\frac{1}{(\frac{\sqrt2}{2})(\frac{1}{2}) + (\frac{\sqrt2}{2})(\frac{\sqrt3}{2})} =\frac{1}{(\frac{\sqrt2}{4}) + (\frac{\sqrt6}{4})} =\frac{1}{(\frac{\sqrt2 + \sqrt6}{4})} = \frac{1}{1} \cdot \frac{4}{\sqrt2 + \sqrt6} = \frac{4}{\sqrt2 + \sqrt6} Now I have to rationalize the demiantor: \frac{4}{\sqrt4 + \sqrt6} \cdot \frac{\sqrt2 - \sqrt6}{\sqrt2 - \sqrt6} = \frac{4\sqrt2 - 4\sqrt6}{2-6} \frac{4\sqrt2 - 4\sqrt6}{-4} = {-\sqrt2}{-\sqrt6} You agree with my answer or not?
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I have no single idea what you just said in your reply YT2095......
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Interesting experiment with soaked newspaper
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
I have this theory that the papers might not be saturated because so it would allows the inks to interact with the papers very well. Phi for All said the processes might involve some waxing. But my fingers would still get black smudges, so I have to wash my hands everytime. Also it depends on the wax's strength. See, when the newspaper is very wet, it is VERY easy to tear it. Usually wax would make things tougher, but it don't work that way on the newspaper. So Phi for All's thesis might be inapporiate. What do you think? -
Interesting experiment with soaked newspaper
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
Thanks ecoli. I am always a very curious guy asking a lot of questions. You helped me with my limiting and deriviate problem. You won't be surprised if I will be asking thousands of more questions. -
There is no electrical section here on SFN so I figured I will just put it on the general talking forums. See, I have this problem. I have 3 utility outlets in my room. (120V of course) One outlet is occupied with my TV and my video/dvd player. The second one is occupied with my alarm clock. (That left a hole left). The third one is occupied with nothing. So whenever I have my laptop plugged in the second outlet with the alarm clock, my TV would get all wierd and fuzzy. Colour is not fusioning correctly and just messed up the screen. I became frustated, so I shutdown the laptop, and then the TV is fine. My question is do you guys have any idea what is happening here?
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Interesting experiment with soaked newspaper
EvoN1020v replied to EvoN1020v's topic in Organic Chemistry
WOW. Very interesting.. I never thought of that. You are thinking "outside of the box". Thus came the next question: What are the papers made of? What are they chemically composed of? -
Few days ago, as I got off the school bus, I walked on my driveway and guess what I saw? To my digust, my most favorite stationary was laying on the ground - soaked!! I thought at that point, it is finished. I will miss the front page news, the updated sports, political flings, people's opinions for the day. I tried to pick the newspaper up but it fell out of my hands instantly. I grimaced as I just tore it. To my second attempt, I put out my both hands and carry it like a baby back to the house. Then I put the wet papers on a bar and left it there to dry. Still at that point, I thought the papers are done, where I won't be able to read, because I assume the inks would get smogged and undefine that I won't be able to read anything. After a few hours, to my surprise the inks on the papers appeared like a brand new dry package. No single mess is displayed on it. I wonder if the newspaper companies use a special ink? Some kind of magic ink? Hahaa, I don't know, but I was just wondering what they use for ink. I sat down and sipping my Pepsi, delighted to read the missed news.
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What kind of common ancestor, HUH?
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Evidence of Human Common Ancestry
EvoN1020v replied to Radical Edward's topic in Evolution, Morphology and Exobiology
Very good Ryan Jones. -
I HAVE A NEW QUESTION!! Give the exact value of each of the following: For example \cos\frac{7\pi}{12}. Using the additive and subractive trigonometric identities to establish the exact value. What I did was: \cos\frac{7\pi}{12} = 105 degree \cos(\frac{\pi}{4} + \frac{\pi}{3}) = \cos\frac{\pi}{4}\cos\frac{\pi}{3} - \sin\frac{\pi}{4}\sin\frac{\pi}{3} (\frac{\sqrt2}{2})(\frac{1}{2}) - (\frac{\sqrt2}{2})(\frac{\sqrt3}{2}) \frac{\sqrt2}{4} - \frac{\sqrt6}{4} \rightarrow\frac{\sqrt2 - \sqrt6}{4} So in the similar method above I don't know how to do this: \sec\frac{-\pi}{12}??? Can anyone help me?
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Evidence of Human Common Ancestry
EvoN1020v replied to Radical Edward's topic in Evolution, Morphology and Exobiology
It depends on how people look at it. My perspective is rather different than you Ryan Jones, because you are not thinking thoroughly. If we have the ability to cure gene even before birth, it can have its disadvantages. If everybody is born perfect then there will be too many people on the planet. We succinctly need thousands of people to be dead every day. I don't want to sound like a devil but it's a way to reduce our exponentially population boom. We are running out of resources and natural needies. UNLESS, we create morbid space station out in the space? Anyway right now it's not a good idea to converse sicken babies into perfects. What do you guys think? -
Evidence of Human Common Ancestry
EvoN1020v replied to Radical Edward's topic in Evolution, Morphology and Exobiology
Yes Lamarck. -
Evidence of Human Common Ancestry
EvoN1020v replied to Radical Edward's topic in Evolution, Morphology and Exobiology
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I never took biology class, so it was interesting to learn about viruses. So I assure that Darwin's theory is still a "theory".
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I understand a bit more now. Thanks for trying to put in effort to explain it to me.
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Excellent explanation Conceptual. As you do point out that viruses have multicellular lifeforms and having a better way to evolve the DNA. In the other thread entitling "Evidence of Human Common Ancestry". I tried to explain that Darwin's theory could actually happen. Maybe Conceptual's explanation helped my hypothesis?