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/sci/ board - Science & Math - August 2014

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Most viewed threads in this category

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neat https://maps.google.com/maps?q=kennedy+space+center&hl=en&ll=28.586047,-80.651232&spn=0.00093,0.001743&sll=37.023002,-76.292459&sspn=0.433089,0.892639&t=h&z=20&layer=c&cbll=28.586056,-80.651203&panoid=_-Be6nNXFZeCWRIVGA342g&cbp=12,285.93,,0,6.92
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this is the type of stuff that i need to be able to do for my college placement test tomorrow is it possible to learn it in a day? i sort of understand exponents

bio q's

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melanin has a nice amount of conjugated double bonds that allows it to absorb higher energy light waves. this is because a single bond has a lower bond dissociation energy (it's weaker) than a double bond (which is composed of a sigma and pi bond). the melanin absorbs light at a range of frequencies, and pure melanin (a mole or really dark skin) absorbs light at a range spanning the visible spectrum. this is why it appears black. veins appear blue because they are subcutaneous (unlike arteries or other blood vessels) and they have thin walls. in order to be blue, they must absorb all of the colors besides blue. which means they absorb all but the highest energy waves (blue). >how does this occur if the melanin absorbs the highest energy waves? >why exactly is deox. blood lighter in its red pigment. i forgot the pigment in blood, but i can't imagine any change other than lower the partial pressure of CO2 and raising that of O2. something to do with the conformational changes of the heme as it becomes saturated with Oxygen molecules? >a person has two isoenzymes (people normally have one), the cells of this person must contain two different sequences of: a. rRNA that translate into mRNA (obviously wrong) b. AA's that translate the DNA (obv. wrong) c. DNA that codes for this enzyme d.tRNA that code for amino acids >how do i know when a mutation affects the tRNA (anticodon) or the DNA (which emerges from the nucleus itself) >and does rRNA play any role in coding? it just reads and translates, not to mention provide a place to do it all in. >also can someone give me a generalized idea of what happens in mitosis, meiosis i and ii. a way for me to remember it qualitatively and knowing what important happens at which steps.
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Try disprove or at least devalidate this bit of troll metaphysics. It's been bugging me since I made it up earlier today. Any universe like ours will reach a state of zero information given an infinite amount of time. All scenarios of physics are time-reversible. Therefore, time-reversing zero information infinite amount will not only yield information, the information can be that of any scenario that heads towards zero information. And I'm not even sure literal eternities are required to reach zero information.
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Love is not a chemical or a chemical reaction. If love were a chemical or a chemical reaction we would be able to see, smell, touch and taste love, just as we see, smell, touch and taste chemicals. But we cannot see, smell, touch or taste love; and this is because love is not a chemical or a chemical reaction. If it were, we would be able to put this chemical or these chemicals into a jar and say, "here is a bottle of love", but that would be absurd. You say, "it is not just a chemical reaction, it is a chemical reaction in the brain that creates an attachment". Well say if this so-called love chemical was put into the brain when a man had nothing around him to form an attachment with, yet he stills feels the pleasure associated with this chemical - would we be able to say that he were in love? What if created an attachment for a teddy bear that was put in the room; would we say that he fell in love with the teddy bear? No? If a man was "conditioned" so that the love reaction happened in his brain when ever he heard the word "summer", would that mean that he was in love with the word "summer"? You say, "it is not just a chemical reaction and an attachment, it is a chemical reaction in the brain that creates an attachment to another human being." OK, but what is the cause here and what the effect? Is it the chemical reaction that causes the attachment to the beloved, or is it attachment to the beloved that causes the chemical reaction? If it is the chemical reaction that causes the attachment, then what causes the chemical reaction? Does it just happen? No, it happens by a "trigger", i.e. when a man sees the beloved. But if the attachment comes first, then what causes the attachment?
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>tfw sci thinks my medical degree is worthless because it's biology
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Hey /sci/ This isnt a homework problem I swear I am attempting to teach myself maths and this came up on an algebra one test sheet I got the other 14 questions right so I think I understand the basics but I keep getting this question wrong I`m not sure if I`m dividing the negative exponents correctly I would really appreciate a walkthrough here as I do not know anyone IRL who can help me with this and I dont want to progress onward in maths if there is a rule I dont understand
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http://www.extremetech.com/extreme/186805-the-solar-storm-of-2012-that-almost-sent-us-back-to-a-post-apocalyptic-stone-age >If a giant solar storm hit the Earth, large parts of society could be without power for months or years. What are the chances of something like this happening to Earth in the near future?

Mental tiredness

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Hey /sci/guys, I woke up approximately three hours ago, so middle of the night. Its just now getting daylight outside. I tried laying in bed, relaxing, etc, but failed to return to sleep. I only rested for about 4-5 hours. I ended up getting out of bed to study, but it was very familiar to whenever I would try to study at university: mind keeps trailing off, only covering a few pages in the course of an hour over very easy material. I can only deduce that my abnormally short attention span is due to the lack of sleep. Is there any fool proof way of returning to sleep once woken up in the middle of the night? Or a way to reduce the mental tiredness that comes with it?
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So this girl and I want to fuck as a casual sort of thing. She had the HPV virus at one point in her life, got cervical cancer and now she can't have any more children. This isn't a problem for me. My question is, because HPV is a viral condition and lives on the skin (I think?) I don't think it can be "gotten rid off" so to speak. Is that correct? Am I at risk of catching anything if I fuck her? Help an uneducated bro out. Thanks guys.
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Hi /sci/, Why do you milk from creativity? Do you have no shame?
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Is it possible for a "When Worlds Collide" type of event to occur?
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How much calculus/ math knowledge vs chemistry knowledge is required for your first chemical engineering course? I'm about to take chemical engineering 1, and I was wondering if it would involve a strong understanding of math, or since it isn't too far down the line in terms of difficult classes if it would just be like a more advanced chem class?
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Why do so many people including even scientists believe that time is an independent dimension? "Time" is actually a human idea that was invented to help us communicate the concept of duration. But time and duration are actually just references to the motion of one object in comparison to another. So for example, 12 noon is not a measure of time but a measure of where everything in the universe will have moved to at the exact moment that the earth has rotated a certain amount to position the sun at a certain place in the sky.
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Do water-soluble nutrients really leach out of food if you poach them? If true, does steaming remedy this?
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What determines which iteration of the big bang you are born in?

Fields

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Can someone explain in detail the work of the newest Fields Medal winners?
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If c is generally defined as 299,792,458 metres/sec, and the metre is defined as the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second, would I be using cirular logic if I stated that a photon can travel 299,792,458 metres in a second? Why are these defined in or in like terms of the other?
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Why don't we terraform the Venus or Mars?
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Hypothetical question: Say you're a guy working on an energy project that you are positive will change everything in the energy market, and so far it's going so well that you might as well say it will meet all expectations, deadlines and exceed some hopes, and you are so far ahead of schedule that the three major competitors are left in the dust. Say your company has a policy of secrecy and disinformation so strict that you can't tell anybody about it. Say you have a lot of money invested in mutual funds that are probably invested in stuff that will be worthless in five years or sooner when the company does its big reveal, and you want to take the money out of the mutual fund and invest it in your company, and other companies that will benefit from the essentially free energy your company's project will make available. Is this insider trading? Will i get in trouble for it? Will my company frown on this (I know if I ask anybody they will say no, but i have seen no official policy/memo to that effect) and will I be risking something that might damage the company? And what should I invest in? What will be the effect on the economies of the world of very cheap and portable energy?
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