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Old 01-23-2014, 05:56 PM   #31
Sheldonrs
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Quote:
Originally Posted by DanaC View Post
That doesn't work. I change it to a smaller fraction, like 1/3 - 'resulting in one third of its mass'

It has to be 1/81st, surely?
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Old 01-27-2014, 03:48 PM   #32
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***New Question***

If poison goes out of date, is it more, or, less poisonous?

And, yes, I know it will still be poison, more or less.
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Old 01-27-2014, 04:01 PM   #33
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I don't know about that, but kids today say "one fourth" instead of "one quarter." At least in my hood. And I can see how that makes sense.

But you would think they would also say "one second" instead of "one half," but they don't. They're still saying "one half." "One second" might be confused with "one sixtieth" because there are sixty seconds in a minute, and sixty seconds in a degree.

I'd say 1/81 is "one eighty-first."
There are 60 seconds in a minute of angle, and 60 minutes in a degree.
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Old 01-27-2014, 04:06 PM   #34
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Originally Posted by fargon View Post
...and 60 minutes in a degree.
Is this why time seems to stand still when it's really hot?
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Old 01-27-2014, 04:12 PM   #35
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There are 60 seconds in a minute of angle, and 60 minutes in a degree.
Or course you are right! Thanks for refreshing my memory on that.
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Old 01-28-2014, 08:02 PM   #36
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Yes, 1/81 is 'one eighty-first'.

Re poison ... depends on the poison. Some break down and lose potency (but no one here would know about that, right?). Others remain lethal to the end.
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Old 01-28-2014, 08:39 PM   #37
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how about iocaine powder?
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Old 01-28-2014, 08:46 PM   #38
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That requires slow, careful acclimatization, patience and appreciation needed; then you defeat the egotist (inconceivable!!) and win the Princess.
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Old 01-29-2014, 09:15 AM   #39
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You fool! You fell victim to one of the classic blunders - The most famous of which is "never get involved in a land war in Asia" - but only slightly less well-known is this: "Never go in against a Sicilian when death is on the line"! Ha ha ha ha ha ha ha! Ha ha ha ha ha ha ha! Ha ha ha...
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Old 02-03-2014, 01:47 PM   #40
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***New Question***

Why are circuit boards (especially the older ones) green?
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Old 02-03-2014, 02:59 PM   #41
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That's solder mask, protecting the circuitry (etched copper) from scratches and from solder wicking and shorts and corrosion. When producing circuit boards (I was QA supervisor at a high tech board manufacturer back in the day) the copper layer is etched into the circuitry pattern, then solder mask applied, then sent through a solder bath system with air knives to coat the exposed copper surfaces in solder, those surfaces being either through-hole or surface mount areas for components (typically a tin/lead alloy.) The mask prevents a big old mess of solder covered copper for that process.

That's it in a nutshell anyway. The green mask isn't always used: we made some boards coated in gold plating, and some the exposed laminate was left that way. Depends on the application and intricacy of the board. Don't know why green is the color, but when I worked in the industry it was all green.

Last edited by infinite monkey; 02-03-2014 at 03:11 PM.
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Old 02-04-2014, 12:40 AM   #42
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When working with circuit boards, you never get out of the shop. It's the only green you get to see.
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Old 02-04-2014, 08:47 AM   #43
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Quote:
Originally Posted by infinite monkey
That's solder mask, protecting the circuitry (etched copper) from scratches and from solder wicking and shorts and corrosion. When producing circuit boards (I was QA supervisor at a high tech board manufacturer back in the day) the copper layer is etched into the circuitry pattern, then solder mask applied, then sent through a solder bath system with air knives to coat the exposed copper surfaces in solder, those surfaces being either through-hole or surface mount areas for components (typically a tin/lead alloy.) The mask prevents a big old mess of solder covered copper for that process.

That's it in a nutshell anyway. The green mask isn't always used: we made some boards coated in gold plating, and some the exposed laminate was left that way. Depends on the application and intricacy of the board. Don't know why green is the color, but when I worked in the industry it was all green.
Holy shit, infi. This post was amazing. I love it when I discover that someone is secretly an expert in something you wouldn't expect. Like classicman and mushrooms.
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Old 02-04-2014, 08:54 AM   #44
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Inf hides so many lights under a bushel it's damn near daylight under there :P
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Old 02-04-2014, 09:01 AM   #45
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Does my desperate lifestyle show when I say you two just made my day?

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