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physical chemistry texts sempa 12/12/16(Sun)09:59 No. 14643 ID: 202542 [Reply]
14643

File 135564834964.jpg - (21.01KB , 320x279 , ancient-aliens-giorgio-tsoukalos-mars-attacks-ack-.jpg )

Hi, I was wondering if anyone knew how to grab copy of two of Donald Mcquarries texts

Physical chemistry: a molecular approach and Molecular thermodynamics. I've been looking for a good physical chemistry book but can't find any at my library or online so far :(


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Anonymous 13/01/03(Thu)20:37 No. 14697 ID: 5e446e

>>14643
I feel your pain. The only good chemistry book I could find was 30 years old last checked out in 1991.
It had missing elements and such, but It was quite a nice book.
I would recommend just buying or downloading them.


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Anonymous 13/02/09(Sat)02:25 No. 14764 ID: 677c04
14764

File 136037313233.jpg - (157.89KB , 640x841 , 1356062615768.jpg )

>>14643
not sure if they have it but try:
en.bookfi.org
found almost every textbook i needed for college this year on this website.




Anonymous 13/02/08(Fri)14:40 No. 14763 ID: a1eecc [Reply]
14763

File 136033082140.jpg - (1.73MB , 2592x1936 , image.jpg )

Hmm...




biggest con Anonymous 13/01/29(Tue)18:49 No. 14744 ID: c73202 [Reply] Locked
14744

File 13594817979.gif - (9.98KB , 712x234 , bs.gif )

So if the earth is turning at 1400km/h give or take and whizzing around the Sun , which is spiralling into a black hole. How the hell don't we feel all of this movement. I cant just accept its relative and that's that.

I want to be able to take advantage of the movement. for example if we new it was all going from west to east I could use the momentum of everything moving in the same way to increase my strength even if for a second.

I mean it must be falling or moving coz the satellites stay up in constant freefall, how come they can take advantage of the movement but I cant.

TL:DR Nothing is really moving but we all think it is and there is no way we can prove it either way unless we rely on more hocus pocus.

inb4 flat earth, well duh


4 posts and 1 image omitted. Click Reply to view.
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Anonymous 13/01/30(Wed)13:27 No. 14749 ID: c73202

shills everywhere

surely we must be able to feel it a bit.

If you are standing in square room there must be one point around you in a sphere where everything is moving from or too, like a tube or something


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Anonymous 13/01/30(Wed)17:55 No. 14750 ID: c73202
14750

File 135956495583.gif - (10.64KB , 1006x700 , Untitled.gif )

in one second, or whatever part there of things must move in one direction?

Are there any tools we can use to figure this out?


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Nattajerk 13/01/31(Thu)03:48 No. 14753 ID: 06a11f

>How the hell don't we feel all of this movement.

the human body does not feel movement, it feels changes in movement (Accelleration).
as well, while we are always changing slightly in movement as the earth spins, given the scale of things it is beyond our ability to feel it.




Anonymous 13/01/31(Thu)03:05 No. 14752 ID: 75f557 [Reply]
14752

File 135959790253.jpg - (13.21KB , 300x300 , Holga 120n.jpg )

Hey guys, I don't know if this would be the place to post about something like this but I'm thinking about getting into analog photography, would you guys have any recommendations for good quality analog cameras? Preferably something under $100. I've been looking at Holga cameras but hear some people say it's for people that know their shit, ironically. I'm just really tired of taking pictures with digital cameras and having to use like Camera+ or some shit to give it that vintage look I want.


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Anonymous 13/01/31(Thu)13:56 No. 14754 ID: 0e2173

If you don't know then you shouldn't post. Also, this is not the place for this thread.




Biohacking Anonymous 12/12/25(Tue)09:46 No. 14665 ID: 79837a [Reply]
14665

File 135642516586.jpg - (78.15KB , 1113x835 , image001.jpg )

http://en.wikipedia.org/wiki/Biohacking

how do you feel about this? And could this be the next big thing?
inb4 gene-manipulated terroristic groups form


11 posts omitted. Click Reply to view.
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Anonymous 13/01/21(Mon)19:17 No. 14736 ID: c1bebf

>>14733
>Your arguments are pointless. Money and opportunity already empower people beyond their means and create biased superiority.

>Even if this wasn't the case, there would still be inequality due to genetic predisposition, so no matter which way you turn, however small the variable is, no men are equal.

This was the point of my arguments, thank you.


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CandleJack 13/01/25(Fri)22:21 No. 14739 ID: 2f260d

>>14733

Just because there is a small difference doesn't mean we should just shrug our shoulders and allow there to become a huge difference. That's like saying: people are already starving in Africa, so why should we send aid? If we do not, a few more will starve than already do. We can't save them all so it's not worth the effort.

Avoiding a tumble down a slippery slope is exactly why such morality exists. So we know where to draw the line.

The illusion of a "utopia" that will bring peace and love and and end to scarcity is total bullshit. Here we are in the grand 21st century in countries where the service economy is the largest sector; and yet a few billion people in rural areas are still living and working exactly as they did three-thousand years ago: subsistence farming and a little bit of trade. Even if we hit the so-called technological singularity, it's not going to suddenly poof all of humanity into a golden age of civilization. Oh sure, SOME people will become immoral gods that rule from inside a computer or a remote-controlled android/cyborg body... but those billions of people in China and India and Africa and where ever else will be just as unaffected in their day-to-day lives as they have been. There will still be slums, still be starvation, still be poverty and disease and death... just OVER THERE, not HERE. The divide between the rich and poor will simply continue to widen until the rich become a completely different species.

I don't exactly mean to say that is a good thing or a bad thing (after all, I'm an upper-middle class, white-collar worker in the USA making so much money per year I don't know how to spend it all besides almost-literally tossing it out my car's windows; so I'm one of the lucky few in top) just that it IS A THING, and that such biological enhancements will be of no benefit to roughly half of humanity.


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Anonymous 13/01/27(Sun)00:54 No. 14740 ID: c1bebf

>>14739
>allow there to become a huge difference

The difference is already huge. Technological augmentation would not be any more severe than the difference already is.

Why should it matter whether or not the guy who is rich enough to hop on his yacht at any moment he likes and sail to Monaco, followed by a trip to Thailand to strangle a six-year-old prostitute to death, then go on to Japan to dine with CEOs and heads of state, happens to have a pair of bionic eyes that lets him see farther than I can?

>Avoiding a tumble down a slippery slope

There is no slippery slope here, because you are already living in the disaster you're foretelling. You're insisting that the sky is going to fall when the rubble of it is already around us.

>The illusion of a "utopia" that will bring peace and love and and end to scarcity is total bullshit.

Who was talking about utopia? All I'm saying is that the "immoral gods" you're talking about already exist, and that it makes absolutely no difference to the rest of society whether they're doing what they do from a penthouse and boardroom or a heavily shielded satellite with a virtual environment that houses their mind.




Anonymous 12/09/29(Sat)11:54 No. 14219 ID: 3df1f8 [Reply]
14219

File 134891248792.jpg - (178.13KB , 697x551 , 1343272944883.jpg )

After running a server for a few months, I must face that I have horrible server practice.
Example: All my mySQL databases are with the root user. The computer itself has the root user enabled. Most processes are run with a high level user.

Where can I get some reading material to have proper server etiquette?


>>
Anonymous 13/01/21(Mon)15:21 No. 14735 ID: 9d9b6e

well, you seem to know how *nix user accounts work, so here it is:

Make a new user for every daemon you run, make a group for related daemons (i.e. the AMP in LAMP) and configure file permissions to reflect this. I.E., dont let PHP have any access to SQL's config, or dont let SQL have access to apache, who should have access only to the components of the others which it needs.

Seriously, it's about making daemon-users only be capable of doing one thing at a time. Google how to make users and how to configure permissions...


>>
Anonymous 13/01/23(Wed)12:24 No. 14737 ID: 4be928

>>14735

would a book on system administration cover this kind of thing? I'm not OP but I'm looking to move to a VPS from shared hosting and don't really know what I'm doing. I can use linux just don't know how to configure things either. Earlier tonight I set up an amazon ec2 instance for the first time and was opening ports left and right trying to get it to work not quite understanding what I was doing.




Anonymous 13/01/06(Sun)23:54 No. 14701 ID: c29d11 [Reply]
14701

File 135751287788.jpg - (7.44KB , 251x214 , cleffa.jpg )

How hot would Venus be even if it was terraformed and the greenhouse effect was eliminated?


3 posts omitted. Click Reply to view.
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Anonymous 13/01/09(Wed)19:57 No. 14711 ID: 5e446e

>>14708
Well I do not know much about the greenhouse affect on Venus, but we can compare it to earth. Earth absorbs 23% of the heat from the atmosphere and 48% at the surface.
So it seems not like a big thing. But if carbon dioxide levels increased by 1% on earth, it would be catastrophic.
So just imagine if we completely wipe it out.


>>
Anonymous 13/01/10(Thu)06:26 No. 14712 ID: c1bebf

>>14708
It's somewhere between 800 and 900 degrees Fahrenheit.

But even if we could dial back the greenhouse effect and bring the temperature in a livable range, the pressure at the surface would still be upwards of 90 times our own.

The surface of Venus is never going to be a place where humans can live.


>>
Anonymous 13/01/21(Mon)15:14 No. 14734 ID: 9d9b6e

the way venus does "plate tectonics" would make the planet uninhabitable in the long run anyway.

Basically, instead of a broken shell of plates that slowly slide under and over each other, venus refreshes it's whole surface at once.

Yeah, fuck that




derrrrr.... Anonymous 12/10/26(Fri)17:10 No. 14288 ID: 6f1470 [Reply] [First 100 posts] [Last 50 posts]
14288

File 135126422592.jpg - (50.53KB , 500x753 , funny-awesome-animals-16.jpg )

'nother laymen question for you eggheads.

a plankth length is supposed to be the smallest possible measurement. I've heard scientists say that there just isnt anything smaller. how can that be? why is, say, half a plankth not a valid measure?


152 posts and 2 images omitted. Click Reply to view.
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Anonymous 13/01/14(Mon)13:11 No. 14718 ID: f98e47

>>14583
I still don't see where this implies that the square root of 2 DOES NOT EXIST.

>>14707
Wait, when did this discussion become about language? OP has probably been waiting for ages to know the answer to his question, and now you tards are talking about proverbs and predicates.
It's science, but not what this discussion needs.


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Anonymous 13/01/17(Thu)13:13 No. 14726 ID: a4a599

>>14718
Oh, i stopped caring a looooong time ago. This is kinda amusing actualy. Like watching a dog chase its tail.


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Anonymous 13/01/17(Thu)17:49 No. 14728 ID: c1bebf

>>14726

Indeed. Why do you think I've stuck around so long? It's all about the entertainment value.




PCI Card Anonymous 13/01/17(Thu)15:26 No. 14727 ID: 50727b [Reply]
14727

File 135843277228.jpg - (41.71KB , 444x300 , OME-PCI-1602_l.jpg )

help, i need to select a pci card which allows me to observe 15 signals, 8x sinusoidal, f=200kHz, Amplitude=0,5V
3 x square signals UART(COM) 1,8432MHz, ETH 2,5MHz, MAIN 16MHz,
2xa synchronic +-7,5V, resolution 1mV
2 x current 5v, 33 V, +-0,15V

anyone could help..?




Anonymous 13/01/10(Thu)14:44 No. 14713 ID: 22a42b [Reply]
14713

File 135782545327.jpg - (139.89KB , 1040x628 , rs232 to rs485 rs422.jpg )

ho do i connect the zoom focus and ground to this green thing?


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Anonymous 13/01/10(Thu)17:17 No. 14714 ID: 7a093f

Do you mean if you're just using it as a pass-through connection? Are you tying it into some kind of controller? What's the converter for? I need more information. I'm sure you don't need to be told to solder the wires on the board?


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Anonymous 13/01/10(Thu)17:35 No. 14716 ID: 22a42b

>>14714
i need to use it the computer to control the zoom and focus through the rs232 port in the cctv camera


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Anonymous 13/01/13(Sun)05:18 No. 14717 ID: 30eb2d
14717

File 135805069684.jpg - (42.27KB , 651x620 , UGLY.jpg )

Multimeter?




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