Archived threads in /sci/ - Science & Math - 405. page
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here you go op
>>7801675
>separate the 2 rings
Meaning break at least one C-C bond?
Oxidize the fuck out of the doubly benzylic carbon.
Of course this is likely to affect the amino groups too.
Very small tweezers and a steady hand.
>got 5 qt 3.14 grills in my phd office (i study mathematical physics)
>been 1 year here and I don't even know their names
>one day they come by my desk
>nearly have a heartattack
>"hey anon, are you come to the department BBQ tomorrow?"
>"uhhh t-thanks b-but i've got a lot of work t-to do this whole w-week. M-Maybe another t-time..."
I think I did...
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>saying no to free food
>>7800581
>Being anti-social
I hope you weren't planning on an academic career or anything...
>>7800591
>eating BBQ food
Enjoy your cancer.
Anyone got the book, or I should ask /lit/ ?
I can't find it anywhere except some torrent w/o any seeders and i'm too europoor to buy it from amazon.
Unmasking Europa: The Search for Life on Jupiter's Ocean Moon 2008th Edition
http://www.amazon.com/Unmasking-Europa-Search-Jupiters-Ocean/dp/0387479368
Have a nice time.
http://gen.lib.rus.ec/book/index.php?md5=c4b3768c8e5aca314413eb66bcf3474f
>>7807636
Thanks man
>these data
Hey guys, chemistry noob here. Can you help me with the questions in pic related and explain the answers to me, give me the basic idea of common ion effect on solubility?
Am I right for the first question?: The concentration of Pb2+ goes up, Cl- goes down and equilibrium shifts to the reactants and lowers the solubility.
>>7804885
Yes, you are correct in your reasoning.
Ions which do not participate in the reaction (e.g. any of the other ones except Cl- in NaCl) do not affect the equilibrium.
>>7804891
But am I correct to assume that adding H2O will increase solubility? Also what happens to the solubility when adding compounds that don't share a common ion?
>>7804897
Since it's aqueous, and solubility product is determined by molarity, not absolute mole content, yes, adding more H2O will increase the amount of Pb2+ in the solution, but the concentration itself will not increase. Adding compounds that do not share a common ion will not affect concentration either, as the reaction quotient will not change.
what is the difference between a total vs partial derivative in common english?
>>7804729
A partial derivative in common english is the same as subliminal parsonship in aristocratic english, whereas a total is the same as a motel.
A partial derivative is a derivative of a multivariable equation where all variables except one are treated as constants.
>>7804729
for example
[math]\dfrac{d}{dx}(xy) = y + x\dfrac{dy}{dx}[/math]
[math]\dfrac{\partial}{\partial x}(xy) = y[/math]
the partial derivative (wrt x) considered all non-x variables (in this case, y) as constant, so as you can see we essentially fixed y such that [math]dy/dx=0[/math].
Was this a good show for science and critical thinking?
>>7804642
Science? No. Critical thinking? Yes.
>>7804690
They aren't a bad resource for education though. They made good points in every single episode.
Does abstaining infleunce your attractiveness? There are many members of the nofap community who seem to overplay the benefits of not masturbating by saying that it gave them a girlfriend. Many even seem to try to explain this with biology: ".The increased testosterone causes your body to give off certain non-verbal cues that women pick up on (deeper voice, clearer skin, etc.)" However, this sounds extrmely like pseudoscience. Are there any biologists here who could tell me to what extent nofap influences your attractiveness?
It doesn't increase your testosterone and it doesn't increase your attractiveness either. There are no medical benefits to abstaining completely, and in fact there is evidence that it increases your chance for prostate cancer later in life. Furthermore, there is ZERO medical difference between ejaculation by masturbation and ejaculation when having sex. "Nofap" is utter nonsense.
That said, porn addiction is a real thing. And if you're fapping many times a day, then that is a problem. If a porn addict gives it up, he won't become more "attractive,"...
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>>7804294
+placeebo effect
>>7804277
Look up Happeh theory
Well /sci/, I just found out today from the chair of my department that I scored in the 94% in the ETS major field test for chemistry. Is that really a big accomplishment or nothing?
>>7803605
Does pic related really exist?
If so please tell me its properties and name!
>>7804019
Jewonium.
>>7804019
>The_Jewish_Gene.png
I need some help, /sci/.
Does this make any sense to you?
>>7802178
Which part are you confused about? After reading, it's perfectly understandable with a little bit of topology and just knowing what math symbols mean.
>>7802178
This is a meme dude, you are being trolled new friend.
>>7802178
Stopped reading at "Mario bump operator"...
Mechanical, Chemical, Environmental, or Electrical?
depends what you like.
be careful to find a job after studies. look for stats of employment ratio / wages in your country. i did chemical eng. would not have chosen it, if i had the choice now ( because of oil crisis)
Looks like math is all about memorization after all...
>>7797984
only if youre dumb
Halp /sci/. I constantly need some form of entertainment in the background while studying. I recently started listening to podcasts while studying and it slows down my progress greatly. Am I addicted? Is there some form of entertainment I can listen to in the background that won't distract me too much?
Ambient music is the best. ıt gets you in the mood, it's not distracting, it's perfect.
https://www.youtube.com/watch?v=BHIFuV0p9Og
could it be that planet 9s obit crosses the earths orbit every few million years in a way that it fucks with the earths gravitational field so that volcanoes explode and whole species like the dinosaurs get extinct?
>>7804910
No.
Next question.
>>7804910
No, but in the 80's they theorized a planet 9 type object was responsible for sending shit from the Oort cloud toward earth.
https://en.wikipedia.org/wiki/Nemesis_(hypothetical_star)
Suppose NASA did actually find out that advanced alien life in our solar system existed, would they REALLY want to disclose the truth to the public?
Would they really?
I mean, consider the geopolitical, economical, religious and social impact here.
Be honest /sci/.
>>7803975
of course they would you massive queer
brainstorm my dick, faggot
>>7803975
Pretty much everyone working at NASA is passionate about space exploration. The massive hike in public support and financing would be too much to pass up on. I really don't think you can tell NASA to just 'keep it quiet' when they discover alien live.
oh look, yet another WHAT IF AYLIUMS thread
>>>/x/
If the universe is ever expanding, does that mean even our solar system is expanding too?
Are we slowly moving away from the sun and other planets?
bump cause im retarded
>>7804871
So retarded that you cant even search google for basic astronomy facts
>>7804861
No, because gravity holds systems and galaxies together.
Universe is being expanded because of dark energy that exists only the the deep space voids between galaxies.
But yeah, in billions of years galaxies will be too far away to see, stars will all be burnt out black dwarfs or black holes and on a long enough timeline, even the black holes will consume every last photon and elementary particle then evaporate themselves.
