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Physics by Phoebe Hurringnug - Wed, 30 Sep 2015 15:30:29 EST ID:pU3iIw+1 No.77210 Ignore Report Reply Quick Reply
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Okay, so I understand that when jumping off of a building it isn't the fall that kills you, but the sudden deceleration or stop that actually does the damage to hurt you.

A car hitting someone is the exact opposite. But, what actually kills you when you get hit by something moving at a high speed?

Assuming the point of contact isn't small enough for the projectile to plow straight through you.

Can somebody please explain this to me
1 posts and 1 images omitted. Click Reply to view.
Basil Pockway - Thu, 01 Oct 2015 20:10:20 EST ID:6VB+GVPW No.77213 Ignore Report Quick Reply
Since you want a physics answer: plasticity.
The force applied by the impact exceeds the elastic limits of bodily tissues. The tissues no longer operate sufficiently to continue life. You die.
Whitey Mashpet - Thu, 01 Oct 2015 20:36:28 EST ID:dkMoIz4p No.77214 Ignore Report Quick Reply
Newtons third law: for every reaction there is an opposite and equal reaction. Your body can't handle that much force and thus you die. Is the answer you where looking for?
William Munderkedge - Sun, 04 Oct 2015 11:49:35 EST ID:cIUKn2oY No.77232 Ignore Report Quick Reply
>A car hitting someone is the exact opposite.

It's in fact the exact same scenario. If you change the frame of reference from the person to the car, it's the person(and the rest of the universe) that's moving.
Martha Pisslespear - Mon, 05 Oct 2015 14:31:19 EST ID:pU3iIw+1 No.77239 Ignore Report Quick Reply
1444069879350.png -(511492B / 499.50KB, 634x476) Thumbnail displayed, click image for full size.

Thanks man
Martha Pisslespear - Mon, 05 Oct 2015 14:35:17 EST ID:pU3iIw+1 No.77240 Ignore Report Quick Reply

Well, I guess what I was looking for was this

When you fall and hit the floor, your body suddenly stops. Causing everything to violently slam against the ground from the points of contact all the way through your body. Say you fall on your face/chest. Your back is going to slam forward and pancake into your rupturing body.

This guy here


Just made my mind moving. If a car hits you, you suddenly accelerate into a point of contact. Violently. Your chest would be compressed into your back, slamming tissues together and causing internal and possibly external rupturing.

TEACH: SCIENCE by Fucking Pesslefield - Sun, 27 Sep 2015 16:21:54 EST ID:LLrpzRn5 No.77206 Ignore Report Reply Quick Reply
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LANOLIN UNTO WOOL by Lydia Dommleshaw - Tue, 22 Sep 2015 15:48:07 EST ID:zkWZUxAO No.77190 Ignore Report Reply Quick Reply
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I bought a kick-ass wool sweater. It is itchy and I want to make it water repellant.
That is why I want to put the lanolin(wool fat) back on it that is removed in wool processing.
Now here is my problem. I don't want to smear it on it but deposit it evenly.
I already have lanolin and now I have two approaches.

1) Dissolve lanolin in volatile nonpolar solvent, stick in shirt, let solvent evaporate.
  • This will probably fuck up the colors
  • Is expensive.

2) Make lanolin/water emulsion by adding for example lecithin to it. Stick in shirt.
  • What the hell does lecithin do to clothes?

Any other ideas?
Phyllis Pattingwell - Wed, 23 Sep 2015 16:32:38 EST ID:cM6rhCgJ No.77191 Ignore Report Quick Reply

Lecithin is an emulsifier with a permanent polar charge associated with it. If you use a lecithin/grease emulsion to coat your wool, the lecithin will be embedded with the lanolin. When water makes contact with the dry lecithin, the lecithin will eventually go back into solution and may remove some grease along with it.

You might try coating the shirt, drying it, washing it in water, and then recoating, drying, washing, until you get the desired waterproofing. The water should remove any active lecithin, and will likely remove some grease associated with lecithin during each wash.

The nonpolar solvent will likely damage the color since most dyed shirts are meant to be washed with soap and water.

You could always try a test patch with the solvent and see how that goes.
A Wizard - Wed, 23 Sep 2015 20:36:58 EST ID:eg2eHljf No.77192 Ignore Report Quick Reply

You are really over doing this. Just wash it with fucking hair conditioner.

Also, wool will never be water repellent unless it has a very tight weave to it. That said, wet wool is still a great insulator.

THE THING by Archie Dasslestire - Wed, 15 Apr 2015 21:08:28 EST ID:9FLQiANc No.76395 Ignore Report Reply Quick Reply
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Where can I find big grates like this? Preferably with tiny rather than larger holes.

I need it for SCIENCE.

I'll let you guess what I'm making.
7 posts and 1 images omitted. Click Reply to view.
Ebenezer Dezzledit - Fri, 29 May 2015 00:57:24 EST ID:9FLQiANc No.76615 Ignore Report Quick Reply





trypto - Fri, 29 May 2015 18:26:12 EST ID:xYeF8coT No.76616 Ignore Report Quick Reply
Is for a case of some kind?
Green Fox - Fri, 29 May 2015 19:03:26 EST ID:0YyKnwjY No.76617 Ignore Report Quick Reply
Some sort of extruder or seive. Possibly an electrode but since you don't care about the material probably not. Faraday cage?
Phoebe Nicklewell - Sat, 30 May 2015 01:42:52 EST ID:xYeF8coT No.76619 Ignore Report Quick Reply
A dehydrator?
Shit Tootcocke - Sun, 13 Sep 2015 23:31:40 EST ID:aeJP3V4O No.77162 Ignore Report Quick Reply
1442201500324.gif -(1059826B / 1.01MB, 320x240) Thumbnail displayed, click image for full size.

>Faraday cage?

Ladies and gentlemen we have a winner!

Your prize is this

I am so sorry

Looking for a site I forgot by 3am !/sly9iFJgg - Tue, 04 Aug 2015 09:33:32 EST ID:9h2+e35x No.76872 Ignore Report Reply Quick Reply
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Was trying to remember an awesome home mad science forum I found a while ago, whose name totally eludes me now. All I remember was that its forum "ranks" were something like "international threat" "threat to self" "national threat" etc, and that doesn't exactly give me great results on Google nor keep me out of the NSA database. Also, its landing page had an alchemist-style seal on a white background.

Please help this weary traveler of the cosmos!

(Picture: Adamantane crystals, essentially a diamondlike type of hydrocarbon discovered in oil)
3am !/sly9iFJgg - Tue, 04 Aug 2015 12:25:17 EST ID:9h2+e35x No.76876 Ignore Report Quick Reply
Nevermind, I found it again
Fuck Lightdale - Fri, 11 Sep 2015 06:12:04 EST ID:PNYSyLXb No.77146 Ignore Report Quick Reply
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Nice board, thanks for the link my fellow traveler!
CrazyFolksTribe !owU3wSU682 - Sun, 13 Sep 2015 00:34:04 EST ID:AHbrzbaQ No.77158 Ignore Report Quick Reply
Bump because adamantane is our friend and the backbone of the wonderful drug memantine.

effect of bioactive precursors in tobacco by Martha Huzzlebot - Mon, 31 Aug 2015 17:28:07 EST ID:hC+7bLwP No.77093 Ignore Report Reply Quick Reply
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Hello fellow /chem/ists, i have a few questions for any biochemists around here, So firstly, if one would ''suplement''( I.e. N. Tabacum) with amino acids that are directly involved in the biosynthetic process(i.e. DL-apartic acid, L-ornithine,-as far as i know these are the only ones), would the nicotine conetent rise as a result?
Also would the same process work with precursors further down the line(like nicotinic acid-seeing as it's NAD-dependant, and say 4-methylaminobutanal)?
Also, do plants even incorporate these substances in the manner i want to use them in?
Any help or imput is greatly apreciated! and thanks in advance!!
9 posts omitted. Click Reply to view.
Hedda Sezzlebork - Fri, 04 Sep 2015 05:13:28 EST ID:hC+7bLwP No.77120 Ignore Report Quick Reply
Goes without saying!
I have already outlined the hypothesis (well, several actually) and the medium i will be using will be standard soil (30%) and perliter(70%) the Ph will be balanced wih LIme and citric acid when necessary, and kept at 6.0-7.0
Shit Pinnerville - Tue, 08 Sep 2015 16:02:23 EST ID:hC+7bLwP No.77129 Ignore Report Quick Reply
OP here, does anyone have anysuggestions on how i should mesure the nicotine content of the leafes GCMS perhaps?
A Wizard - Wed, 09 Sep 2015 01:42:55 EST ID:eg2eHljf No.77134 Ignore Report Quick Reply

The most sophisticated hobo you can find?
Jarvis Hunningteck - Wed, 09 Sep 2015 13:26:28 EST ID:hC+7bLwP No.77136 Ignore Report Quick Reply
''well the bum down the street said he hasn't had a cig like that sience vietnam, so hypotheisis confirmed!''
A Wizard - Wed, 09 Sep 2015 21:38:34 EST ID:eg2eHljf No.77141 Ignore Report Quick Reply

xD Alchemy!

glass water sound [rough musical scale] by David Lightshaw - Tue, 08 Sep 2015 07:49:21 EST ID:JegeNmRk No.77127 Ignore Report Reply Quick Reply
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entry-level by Walter Billingman - Sun, 30 Aug 2015 15:38:00 EST ID:005courH No.77074 Ignore Report Reply Quick Reply
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looking for high school tier physics books, what should i get?
Phineas Sundlewill - Mon, 31 Aug 2015 13:36:05 EST ID:GB64LehD No.77088 Ignore Report Quick Reply
khan academy is all you need
Books they give you in schools are shit

Human Extinction, Great filters by James Mother Fucking Randi !lwriJ94kMg - Wed, 26 Aug 2015 03:10:33 EST ID:q1Ed4MrN No.77016 Ignore Report Reply Quick Reply
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I got into a debate with my room mate today about human extinction/ great filters. He believes that we have passed the tipping point with climate change.

He is of the camp that humans are already doomed unless we perfect interstellar travel, bio dome technology or colonization techniques for our near by planets. That at our current and near future tech (100 years from now) that we wont make it because our world wont support us that long.

I argue what he thinks is a naive view point. That being that humans are insanely smart, adaptable and tough. We had to be to make it this far. That unless the planet is more or less completely destroyed that humans will survive. There will always be some fall out shelter or some dark crevice humans will crawl out of and eventually rebuild.
I maintain that we wouldn't even need interstellar flight. Our solar system is laden with resources waiting for us to take. If we can make it that far then we're almost guaranteed to survive.
A Wizard - Wed, 26 Aug 2015 13:53:36 EST ID:eg2eHljf No.77022 Ignore Report Quick Reply

Pfft, humanity has survived several great world-shattering cataclysms, and people barely even accept the last one as real, let alone the others. I say, don't bother trying to convince them, fuck em really, let the sheeple die and their way of thinking die with them.

I just wish people would fucking learn a thing or two after each server reset, but nope... same old shit for the most part, but they do seem to get stupider overtime.

HAAAAAAAAAAAAAAAALEEELOOOOOOOOOOOOOOOOLYA by Albert Blythefield - Fri, 21 Aug 2015 01:11:48 EST ID:CT0cbrIE No.76947 Ignore Report Reply Quick Reply
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Jesus got my ass off dat crack pipe! U can't explain dat, SCIENCE!!!
2 posts omitted. Click Reply to view.
James Mother Fucking Randi !lwriJ94kMg - Sat, 22 Aug 2015 15:00:17 EST ID:q1Ed4MrN No.76972 Ignore Report Quick Reply
Bombastus !!HToBa9dh - Sun, 23 Aug 2015 16:41:30 EST ID:vbS8CtHn No.76991 Ignore Report Quick Reply
this is a slow board
Bombastus !!HToBa9dh - Sun, 23 Aug 2015 16:42:36 EST ID:vbS8CtHn No.76992 Ignore Report Quick Reply
James Mother Fucking Randi !lwriJ94kMg - Sun, 23 Aug 2015 16:58:18 EST ID:q1Ed4MrN No.76993 Ignore Report Quick Reply
Maybe you're like that because you HAVEN'T tried jenk?
Hedda Lighthall - Tue, 25 Aug 2015 00:59:32 EST ID:uGD5aNS6 No.77002 Ignore Report Quick Reply
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Nigga, you trippin

Jesus is my dealer

Let's talk about renewable energy and sustainability by Simon Fanwell - Wed, 01 Oct 2014 18:45:11 EST ID:CC0/W06s No.75476 Ignore Report Reply Quick Reply
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Sustainability in a real sense, not a marketing buzzword sense.

Keep in mind I have no background in science other than my own casual research and books on the environment and such (never even posted on this board before), so bear with me.

How much hope is there for renewable energy? Will it be capable of satisfying future energy demands? Do future energy demands need to be reduced for us to survive as a species? What about the fact that even things like solar panels are made from ultimately finite materials? We know petroleum is going to become scarce, what do we do about that when so much, even industrial agriculture (as harmful as that is) depends on it?

The process of production itself is destroying our planet and killing humans and nonhumans. Deforestation, pollution, acid rain, dioxin in human breast milk...what can be done about this? Like I asked before: Do we need to consume less to survive?

How is global climate change going to impact things?

What does the future look like?
7 posts and 1 images omitted. Click Reply to view.
Cornelius Bobberpeg - Thu, 30 Jul 2015 00:56:09 EST ID:YqqhzU5U No.76863 Ignore Report Quick Reply
the universe won't "run out" of energy. the existing energy just slowly approaches a uniform distribution.
this happens VERY slowly, as in, several orders of magnitude beyond your imagination. it's also pretty much unrelated to the matter at hand.

on topic: everything that doesn't depend on a fuel that we have to dig out of the ground (oil, coal, natural gas, uranium, thorium, ...) is de facto renewable and sustainable.
that includes
>solar power plants
>wind turbines
>hydroelectric plants

we could cultivate tons of soybeans or rapeseed and process them into bioethanol or whatever kind of biofuel we want. we could build gorillions of wind turbines. we could cover hectars of barren land in solar panels or mirrors for solar power towers.

the thing is, oil and gas are just so abundant and cheap to dig up that fossil fuels are a LOT cheaper than renewable fuels.
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John Pushstone - Thu, 30 Jul 2015 02:22:56 EST ID:138/pGcm No.76864 Ignore Report Quick Reply
This is a very interesting question, and I like to think of it from a few perspectives.
Nuclear energy - if you consider it a sustainable energy source - holds a lot of promise right now. Thorium based reactor designs have plenty of improvements which are usually held against the nuclear energy industry (proliferation worries, meltdown events, waste generation, et al) over purely Pl or U based reactor designs.
At the same time, modern day reactor designs for U based reactors have greatly improved safety as well, and there is a lot of successful work being done to deal with nuclear waste safely.
However, it is obviously not entirely a renewable resource. Unfortunately, solar panels have to be comprised of Si which is industrially refined. The Rubidium tris-bipyridine isn't just passively gleaned from the air, neither. That example ad nauseum for all forms of energy. Biofuels require processing, and leave emissions.

I think though, that making an effort to combat the effects of industrialization on the environment and ecology through incorporating more sustainable energy methods, as well as increased self-awareness in regards to consumption and waste amongst people - that eventually we could reverse devastating climate change.

I'm betting on it too. Not a stock broker, but opened up a trading account and grabbed up what I could on a science grad student's salary. All are green tech, and my portfolio has remained equal at worst to my initial investment, and usually sits at about 15% above initially invested. There's a lot of small companies out there making decent innovations that you aren't even noticing - these guys are merging and getting swallowed up into larger corps with more weight to throw around. It will get better.
Hugh Drimblewere - Sun, 16 Aug 2015 14:21:04 EST ID:lqfCRKYj No.76926 Ignore Report Quick Reply

There's always going to be plenty of shit to burn for fuel. Always.
Henry Cimmerbet - Thu, 20 Aug 2015 21:28:30 EST ID:ILxqROob No.76942 Ignore Report Quick Reply
That's not the point, you can not support tens of billions of people comfortably by "burning shit"
Archie Dunkinbury - Thu, 20 Aug 2015 22:07:54 EST ID:lqfCRKYj No.76943 Ignore Report Quick Reply

Yep, you definitely can. In fact, we could even just burn actual feces to supplement everything else. Fuck, even if the sun were blotted out, we could burn enough coal alone to power lights for our crops for probably a century, or at least the usa and russia could.

Oh, also good to note. The more co2 in the atmosphere, the more plants have access to. Hence faster growth, and more things to burn. So any issues with burning things, are really just issues of lack of infrastructure for producing shit to burn.

So that leaves us with three major things to do to keep burning going.

#1 Stop wasting all of the burnable shit in landfills and down the toilet & into the bays.
#2 Farm burnables in ways that aren't how we grow food crops, or as a secondary crop as part of rotation and such. Example, planting fast growing trees for firewood, interspersed with berry crops that need shade, or perhaps vining crops. Example of a more efficient one, fucking algae grown in giant tuuuuubes of water. Though plant matter is better eaten by food and turned into shit for burning.
#3 Replant the fucking forests. They will clean the air, and drop dead fucking wood we can burn, without having to cut the trees, not to mention tasty wildlife and fruit, should we replant fruit trees.

some chem thoughs by Ernest Fuckinghood - Mon, 17 Aug 2015 16:16:55 EST ID:otaEm3qe No.76928 Ignore Report Reply Quick Reply
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I just want to say thanks to all fags who post here, great discution and *not so much* shitpost

also, what's your background? obviously no names or personal data

>20 years old
>studying chemist as professional career
>most of my knowledge (70%) has been adquired on personal instruction + experience not related to uni + disscutions + little jobs on small labs
>wondering if uni is useful at all

also I think Bombastus is the man, mah nigga
Sidney Minnerdale - Mon, 17 Aug 2015 20:34:34 EST ID:DIZp74tV No.76929 Ignore Report Quick Reply
I'm a professional chemist with a M.Sc. focused in bioorganic chemistry. Now days I work in industry doing analytical method development for GC, LC, MS. University is indeed essential to being a chemist, especially now that there is a significant oversupply in the job market.

Realistically you would have a tough time landing even a very basic lab tech job without a B.Sc. Your prior knowledge will help you a lot in college and university but you definitely need to get the degree for anyone to take you seriously. It's also important to set yourself apart from the other cookie cutter chemists, do some research with a faculty member, keep a flawless GPA, publish a paper, do an internship. That sort of stuff will help you get a good position when the time comes to interview.
Basil Gackleket - Tue, 18 Aug 2015 13:38:32 EST ID:ee2izQdB No.76930 Ignore Report Quick Reply
Are you from easter Europe or Asia where they don't teach you english in school?
Clara Derrytadge - Wed, 19 Aug 2015 23:00:41 EST ID:A9FsJSdZ No.76935 Ignore Report Quick Reply
I'm a professional chemist with a BS in biochemistry. Accidentally stumbled into the construction coatings industry and now I'm their primary curing compounds research and production chemist/developer.

I found university essential to my success; the theory, the basic theory (and lets be honest, the basics is all you learn), helped me to interprate observations I make in the lab. Without the fundamental knowledge you learn in college, I would never have been able to do what I do now.

And, well, to be honest, I never thought I could know as much as I know now. On the job learning is fucking ludicrous if you manage to put yourself in a position where you do your own personal research on the materials. I learn something new every day. And I guess that's the way I like it.
Bombastus !!HToBa9dh - Fri, 21 Aug 2015 16:06:16 EST ID:4ppVjZXo No.76957 Ignore Report Quick Reply
lol. university is great if you make it great. remember that all the part time opportunites are being paid for by your education tuition. so make the most out of university by attending them.
i'm balancing a few jobs. 2 of them chemistry related one of them not. still doing a few post-grad classes while i get a bit more financially independent to continue with a full thesis afterwards. honestly, any job will teach you more about useful chemistry than the classes/shitty labs ever will.
but it's what you put into it that determines what you get out of it

I love you ernestest fuckinghood

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