I know your comment wasn't aimed at me, but I've read some of them... I've learned not to read them at work, it's hard to pretend you're working while laughing that much.

Note that most of the fume hoods mentioned on that site probably would be bulletproof.
In reply to this comment by NicoleBee:
[...]Ever read http://pipeline.corante.com/archives/things_i_wont_work_with/ ?

>> ^ponceleon:

Is the glass on those hoods bulletproof? Just curious...


The ones I have ever used were made of plexiglass, or at least some form of plastic. I do not remmeber seeing one made with glass, but then I have never used one outside a college chemistry lab or a high school.

Tags for this video have been changed from 'nitric acid, copper, pennies, toxic, fumes, nitrogen dioxide' to 'nitric acid, copper, pennies, toxic, fumes, nitrogen dioxide, smog' - edited by therealblankman

I have forgotten most of my chemistry by now, so I have to just dig the equation out:

Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

Cu(NO3)2 is water soluable, that's why the liquid turns light blue (because of the copper ions).

Though I am seeing different equations on the web when I browse. Anyway, copper turns into a water soluable salt that then turns the water blue.

Sorry about a choppuy explanation. Like I said, I haven't touched chemistry in years, plus my English science vocabulary isn't up to par

nitric dioxide? What happens to the copper?

Every action has some form of motivation, even a psycho's mass murdering spree; it's all good and fine to look for it, but in the meanwhile it's the protective action that counts, something the police force in GB took ages to do. As for the "bonehead militias", most of them were simply groups of neighbours and friends trying their best to protect their livelihoods. Most of them were immigrants who had worked hard to build a life for themselves abroad, only to find everything ruined because of unruly misguided youths high on violence.

As for blaming the violence on the bad decisions concerning social services, I beg to differ. Look at the protests/riots in Greece, Spain, etc. All of them had major peacefull counterparts, with actual demands being made. It's not like the so-called "disenfranchised youths" (and they were not all poor, nor young btw) of London and elsewhere did not have recent examples of protests that did not involve using social networking to best loot the fashion shop, and burning people's homes (Arab Spring anyone?).

I agree about the ridiculous consummer identity we have going on in society... "you are what you buy" really sickens me to the bone. As does the corporate criminels going on with their billionaire, society-crushing lifestyles. But is it possible to send a more counterproductive message than the one we've seen in England?

p.s.: what's and ASPO?

>> ^radx:

Unjustifiable as their actions are, calling it mindless destruction by spoilt children does no good in my book. There is a reason, there always is a reason, and I highly doubt it is as simple as it is presented to be in most articles I've read so far. They are criminals, yes, but what's their motivation, what's their reasoning? Without knowing the deeper cause, any actions -- crackdowns as many suggest -- will only suppress the problem for the time being, making a later outbreak all the worse.
Particularly if law enforcement plays dirty, pushes the boundaries of the rule of law -- and the use of billboards and social media by the police as a modern pillory, that's on the fucking edge, if you ask me. If one of those bonehead militias acts upon it, the shit could turn ugly real quick.
Anyway, there's no wisdom, no insight I can claim to have from within the isolation of what is commonly known as the middle class; only impressions and thoughts.
However, the violence cannot come as a surprise, given the unrest last winter caused by a raise in tuition fees; it cannot come as a surprise, given the sheer volume of social cuts, particularly small programs. How can anyone be caught off guard by their blatant disregard of the law given how disenfranchised many of them are, and given how the crooks working in the City of London walked away scot-free after the damage they caused, which was magnitude higher. Who speaks out on their behalf? Politicians? Unions? Seems to me, they're on their own, destined to remain invisible -- until they lash out. They appear to be farther removed from the democratic process than anyone would like to admit. Politics, society, community, whatever you want to call it: they have no stakes in the game.
And how surprising is it, really, to find them looting expensive comsumer products -- you are what you wear, right? It's in your face, everywhere, all the time, particularly in a city like London. So now the folks who were cut off from this just snapped and went for it, no matter the rules? I'm shocked!
As for their treatment by the coppers: are ASPOs still handed out left, right and center in certain districts?
But hey, like I said, I'm too far removed from their reality of life to make any meaningful statements, much less suggestions. Just poking in the dark, that's what this is.

Unjustifiable as their actions are, calling it mindless destruction by spoilt children does no good in my book. There is a reason, there always is a reason, and I highly doubt it is as simple as it is presented to be in most articles I've read so far. They are criminals, yes, but what's their motivation, what's their reasoning? Without knowing the deeper cause, any actions -- crackdowns as many suggest -- will only suppress the problem for the time being, making a later outbreak all the worse.

Particularly if law enforcement plays dirty, pushes the boundaries of the rule of law -- and the use of billboards and social media by the police as a modern pillory, that's on the fucking edge, if you ask me. If one of those bonehead militias acts upon it, the shit could turn ugly real quick.

Anyway, there's no wisdom, no insight I can claim to have from within the isolation of what is commonly known as the middle class; only impressions and thoughts.

However, the violence cannot come as a surprise, given the unrest last winter caused by a raise in tuition fees; it cannot come as a surprise, given the sheer volume of social cuts, particularly small programs. How can anyone be caught off guard by their blatant disregard of the law given how disenfranchised many of them are, and given how the crooks working in the City of London walked away scot-free after the damage they caused, which was magnitude higher. Who speaks out on their behalf? Politicians? Unions? Seems to me, they're on their own, destined to remain invisible -- until they lash out. They appear to be farther removed from the democratic process than anyone would like to admit. Politics, society, community, whatever you want to call it: they have no stakes in the game.

And how surprising is it, really, to find them looting expensive comsumer products -- you are what you wear, right? It's in your face, everywhere, all the time, particularly in a city like London. So now the folks who were cut off from this just snapped and went for it, no matter the rules? I'm shocked!

As for their treatment by the coppers: are ASPOs still handed out left, right and center in certain districts?

But hey, like I said, I'm too far removed from their reality of life to make any meaningful statements, much less suggestions. Just poking in the dark, that's what this is.

As per wikpedia :

Benefits

The combination of fast joining times (on the order of a few seconds), and direct heat input at the weld interface, yields relatively small heat-affected zones. Friction welding techniques are generally melt-free, which avoids grain growth in engineered materials, such as high-strength heat-treated steels. Another advantage is that the motion tends to "clean" the surface between the materials being welded, which means they can be joined with less preparation. During the welding process, depending on the method being used, small pieces of the plastic metal will be forced out of the working mass (flash). It is believed that the flash carries away debris and dirt.

Another advantage of friction welding is that it allows dissimilar materials to be joined. This is particularly useful in aerospace, where it is used to join lightweight aluminum stock to high-strength steels. Normally the wide difference in melting points of the two materials would make it impossible to weld using traditional techniques, and would require some sort of mechanical connection. Friction welding provides a "full strength" bond with no additional weight. Other common uses for these sorts of bi-metal joins is in the nuclear industry, where copper-steel joints are common in the reactor cooling systems; and in the transport of cryogenic fluids, where friction welding has been used to join aluminum alloys to stainless steels and high-nickel-alloy materials for cryogenic-fluid piping and containment vessels.

Friction welding is also used with thermoplastics, which act in a fashion analogous to metals under heat and pressure. The heat and pressure used on these materials is much lower than metals, but the technique can be used to join metals to plastics with the metal interface being machined. For instance, the technique can be used to join eyeglass frames to the pins in their hinges. The lower energies and pressures used allows for a wider variety of techniques to be used.

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

http://www.mtiwelding.tv/videos/index/31

In reply to this comment by rottenseed:
Why wouldn't you just make a mold that makes that whole piece?

>> ^nosro:

This is the same principle used to brake some of the newer roller coasters like Top Thrill Dragster at Cedar Point: http://www.youtube.com/watch?v=LbN3NU4hIZg. In the roller coaster, the train has the magnet which passes over vertical copper fins that you can see protruding up from the track at the end of the ride.


LOL - even better are the times when it goes backwards. Or simply gets stuck:
http://www.youtube.com/watch?v=LeOEZqbCjzQ&feature=related

This is the same principle used to brake some of the newer roller coasters like Top Thrill Dragster at Cedar Point: http://www.youtube.com/watch?v=LbN3NU4hIZg. In the roller coaster, the train has the magnet which passes over vertical copper fins that you can see protruding up from the track at the end of the ride.

>> ^Morganth:

The magnet's aren't attracted to the copper pipe? Lenz's law, you crazy man.


does copper equal iron, nickel, or cobalt?

Your video, Magnet Slowly Falling in Copper Pipe, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

The magnet's aren't attracted to the copper pipe? Lenz's law, you crazy man.

http://videosift.com/video/Magnet-Slowly-Falling-in-Copper-Pipe

I thought it was a really nice touch that copper gently wiping the foam from his face, kinda said a lot!