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Finally... => General Discussion => Topic started by: Dr. D on May 01, 2011, 07:23:17 pm

Title: The Measurement Thread
Post by: Dr. D on May 01, 2011, 07:23:17 pm
So, what is your favorite unit of measurement and your favorite thing to measure?

Mine is the Joule. All other SI derived units are less fun.
Title: Re: The Measurement Thread
Post by: scriver on May 01, 2011, 07:24:26 pm
The Urist, obviously.
Title: Re: The Measurement Thread
Post by: Gunner-Chan on May 01, 2011, 07:25:40 pm
I'm just popping in to say, this is silly and I love that you actually did it.
Title: Re: The Measurement Thread
Post by: ein on May 01, 2011, 07:28:21 pm
I'm just popping in to say, this is silly and I love that you actually did it.

I second the notion.

As for on-topic stuff, I like metric.
Base 10 is best 10.
Though I have grown to appreciate Imperial, less on its own merits and more on how hilarious it is that it's so fucking stupid and yet it's still the standard in America.
Also, I think part of it is also a big 'fuck you' to Europe and the rest of the world.
Title: Re: The Measurement Thread
Post by: Dr. D on May 01, 2011, 07:32:04 pm
I think I will find some really strange units, such as some old archaic units from the English system and others. I like the English unit of mass, the slug.
Title: Re: The Measurement Thread
Post by: Vector on May 01, 2011, 08:15:09 pm
Newtons.

Because someone that persnickety as a unit of force is the best thing ever.
Title: Re: The Measurement Thread
Post by: Duke 2.0 on May 01, 2011, 08:17:28 pm
 As a person under the Imperial unit of measurement system I'll agree that Metric is probably better and I would love to have a base 10 system of measurement. Make everything simple and whatnot.

 However, you must also agree that to change our system of measurement would be absurdly costly and to accuse us of being inferior for keeping with such a system is childish.
Title: Re: The Measurement Thread
Post by: Aqizzar on May 01, 2011, 08:33:33 pm
I know my car can travel 80 rods to the dram, and that's all I need to know.

However, you must also agree that to change our system of measurement would be absurdly costly and to accuse us of being inferior for keeping with such a system is childish.

There's also this.  I hear British people still have a problem with metrics.
Title: Re: The Measurement Thread
Post by: Kishmond on May 01, 2011, 08:34:44 pm
I like the Astronomical Unit.
Title: Re: The Measurement Thread
Post by: nenjin on May 01, 2011, 08:39:57 pm
In this thread we shall revel in our geekiness.

Favorite non-real unit: The Metric Fuck Ton.

Favorite real unit: Hands, the measurement for horses. I dunno why, I've always liked it. Kind of primeval, like the first dude who told other dudes about this thing he saw running on the plains, and he was like "It was this tall!"

I think I'm forgetting some other awesome measurement though.
Title: Re: The Measurement Thread
Post by: Vector on May 01, 2011, 08:41:23 pm
I'll add stone and feet.  Those are ridiculous, too :D
Title: Re: The Measurement Thread
Post by: Angel Of Death on May 01, 2011, 08:44:34 pm
Metric.

It's the one I was raised to use.

The Urist is a close second, though.
Title: Re: The Measurement Thread
Post by: MetalSlimeHunt on May 01, 2011, 10:13:20 pm
Kelvin. I mean, how hard is it to see the logic in a temperature system where zero is, well... zero?
Title: Re: The Measurement Thread
Post by: Ricky on May 01, 2011, 10:15:01 pm
I will have to say the Dwarf Score.
Title: Re: The Measurement Thread
Post by: TherosPherae on May 01, 2011, 10:17:13 pm
Favorite non-real measurements: The Urist & the Arbitrary Unit (don't ask how I use this one.)
Favorite real measurement: Probably watts, just for the lame jokes that I get to say in the middle of physics lecture. They're even funnier because the professor is a huge stickler for units. "I'm sorry, but that's 64 whats?" "Yes."
Title: Re: The Measurement Thread
Post by: Bluerobin on May 01, 2011, 10:17:37 pm
There's something neat and tidy about metric. I mean, the fact that 1 centimeter cubed of water is 1 milliliter is 1 gram? That's just awesome.

Favorite unit though? Angstroms are pretty neat, largely because of the funny little circle on the A for its symbol.
Title: Re: The Measurement Thread
Post by: ein on May 01, 2011, 10:27:58 pm
Aangstroem would be more correct.
Ångström.
Title: Re: The Measurement Thread
Post by: rhesusmacabre on May 02, 2011, 03:08:58 am
As a person under the Imperial unit of measurement system I'll agree that Metric is probably better and I would love to have a base 10 system of measurement. Make everything simple and whatnot.

 However, you must also agree that to change our system of measurement would be absurdly costly and to accuse us of being inferior for keeping with such a system is childish.

Not nearly as costly as total global conversion to duodecimal metric, but when I'm King of the World...
Title: Re: The Measurement Thread
Post by: Pandarsenic on May 02, 2011, 03:19:03 am
Despite being American, I find the Metric system just seems to be more useful and relevant.

My favorite unit is the Hellameter (10^27 meters).
Title: Re: The Measurement Thread
Post by: Virex on May 02, 2011, 03:24:44 am
Favorite non-real measurements: The Urist & the Arbitrary Unit (don't ask how I use this one.)
Favorite real measurement: Probably watts, just for the lame jokes that I get to say in the middle of physics lecture. They're even funnier because the professor is a huge stickler for units. "I'm sorry, but that's 64 whats?" "Yes."
I once had a teacher that, if someone forgot the units, started to talk about cubic crowbars.
Title: Re: The Measurement Thread
Post by: Darvi on May 02, 2011, 05:00:54 am
Of course everybody agrees that Base 10 is the best. Of course, in what base has that 10 been written...
Title: Re: The Measurement Thread
Post by: Enzo on May 02, 2011, 05:08:51 am
So, what is your favorite unit of measurement

Picokelvin.

and your favorite thing to measure?

COMMENT REMOVED - VIOLATION OF FORUM POLICY
Title: Re: The Measurement Thread
Post by: ein on May 02, 2011, 05:37:42 am
and your favorite thing to measure?

Somehow missed this one. :b
I like to measure weaponry.
Heft, length, et cetera.
Title: Re: The Measurement Thread
Post by: Siquo on May 02, 2011, 06:19:36 am
Hmm, I like the Tesla.

Mostly because Tesla rocks, but also because one unit of Tesla is huge, it's like the Metric Fuckton in real units. MRI machines that produce enormous magnetic fields are only 9ish T, and the absolute manmade record in 2009 was a whopping 45T.

And it's cool to say "Tesla".
Title: Re: The Measurement Thread
Post by: scriver on May 02, 2011, 06:28:31 am
As a person under the Imperial unit of measurement system I'll agree that Metric is probably better and I would love to have a base 10 system of measurement. Make everything simple and whatnot.

 However, you must also agree that to change our system of measurement would be absurdly costly and to accuse us of being inferior for keeping with such a system is childish.
Don't have to change it all abruptly, do you? Have both systems for a while, start teaching Metric in school and sooner or later you'll be bi-systemal. Then you can stop using Imperial all together.


There's something neat and tidy about metric. I mean, the fact that 1 centimeter cubed of water is 1 milliliter is 1 gram? That's just awesome.

Favorite unit though? Angstroms are pretty neat, largely because of the funny little circle on the A for its symbol.
It's not funny! :(

On a serious note, though: My favourite unit would be either Celsius, Joule, or Curie, all because I like how they sound. And also Kelvin because of how ridiculously great and impractical it is at the same time. And Rankine because of it's creators absurdly awesome beard (http://en.wikipedia.org/wiki/William_John_Macquorn_Rankine).

I don't see any fun in measuring stuff though.
And while I have a lot of bad jokes about measuring "stuff" bubbling inside me at the moment, I think I'll abstain from posting any of them as I do not want to push this thread further into what I believe Vector has called "boy's locker room humour" territory.
Title: Re: The Measurement Thread
Post by: ein on May 02, 2011, 06:35:47 am
My adventure earlier today.
I guess I exaggerated the total distance and understated the distance walked.
I said three miles by foot as a hyperbole, and it was 3.5. :b (http://maps.google.com/maps?f=d&source=s_d&saddr=HI-83+E%2FKamehameha+Hwy&daddr=HI-83+E%2FKamehameha+Hwy+to:HI-83+E&hl=en&geocode=FaSSSgEdLBWW9g%3BFe7uSQEdrFyW9g%3BFU3JSQEdZXSW9g&mra=ls&sll=21.66381,-157.935494&sspn=0.005115,0.006652&ie=UTF8&ll=21.632218,-157.923832&spn=0.08186,0.10643&z=13)

Also, nearest game store (Gamestop) is about 25 miles away. (http://maps.google.com/maps?f=d&source=s_d&saddr=HI-83+E%2FKamehameha+Hwy&daddr=HI-83+S&geocode=FaSSSgEdLBWW9g%3BFeiORgEd4iqY9g&hl=en&mra=dme&mrsp=1&sz=14&sll=21.406089,-157.799292&sspn=0.040994,0.053215&ie=UTF8&z=14)
Title: Re: The Measurement Thread
Post by: Strife26 on May 02, 2011, 06:37:37 am
Eh, the school systems already teach dual measurement systems pretty much completely, especially any sort of science class. It doesn't change the fact that redoing every sign in the country is kinda pointless and wasteful.
Title: Re: The Measurement Thread
Post by: Duke 2.0 on May 02, 2011, 06:38:01 am
Don't have to change it all abruptly, do you? Have both systems for a while, start teaching Metric in school and sooner or later you'll be bi-systemal. Then you can stop using Imperial all together.
Yeah, that's what we do. Granted we could do a better job ob being equal about it but I'm not gonna deal with the public educational system problems in this thread.
Title: Re: The Measurement Thread
Post by: Simmura McCrea on May 02, 2011, 06:38:33 am
Eh, the school systems already teach dual measurement systems pretty much completely, especially any sort of science class. It doesn't change the fact that redoing every sign in the country is kinda pointless and wasteful.
You mean like in the UK where all the signs are in kilometres? Oh wait.
Title: Re: The Measurement Thread
Post by: Blargityblarg on May 02, 2011, 06:39:58 am
My favourite unit is the Deni (Equal to one Kgms-1, named for a friend of mine when we realised Momentum didn't have a fancy unit name.)

My favourite thing to measure? Well, I'm going to plunge past all those folk saying they don't want to be immature and come right out with it.

Girth.
Title: Re: The Measurement Thread
Post by: RedKing on May 02, 2011, 06:40:36 am
The hogshead. One, because it makes you wonder if they actually used the head of a hog at some point to derive it.

Second, because it's the only volume measurement I know of that changes dependant on what is being measured. For wine, it's 63 gallons, for beer it's 54 gallons.

Thirdly, because it's mostly used to measure booze. Seems a very dwarfy unit.
Title: Re: The Measurement Thread
Post by: scriver on May 02, 2011, 06:48:19 am
Eh, the school systems already teach dual measurement systems pretty much completely, especially any sort of science class. It doesn't change the fact that redoing every sign in the country is kinda pointless and wasteful.
Gotta start somewhere. As I said, there's no need to change all at once, especially if you're already taught both.

Yeah, that's what we do. Granted we could do a better job ob being equal about it but I'm not gonna deal with the public educational system problems in this thread.
Good to know. I'd gotten the impression that you was only taught Imperial.
Title: Re: The Measurement Thread
Post by: ed boy on May 02, 2011, 08:52:13 am
I must say, I've always disliked the electronvolt.

The span and the cubit, however, are pretty good units.
Title: Re: The Measurement Thread
Post by: olemars on May 02, 2011, 09:06:43 am
Slugs per dry bushel.
Title: Re: The Measurement Thread
Post by: Armok on May 02, 2011, 10:35:00 am
Bits, as an unit of evidence. Which is incidentally also a good thing to measure.
Title: Re: The Measurement Thread
Post by: TherosPherae on May 02, 2011, 10:41:59 am
Favorite non-real measurements: The Urist & the Arbitrary Unit (don't ask how I use this one.)
Favorite real measurement: Probably watts, just for the lame jokes that I get to say in the middle of physics lecture. They're even funnier because the professor is a huge stickler for units. "I'm sorry, but that's 64 whats?" "Yes."
I once had a teacher that, if someone forgot the units, started to talk about cubic crowbars.
I once had a teacher that would, in every situation where someone would forget to mention the units in their solution, imply that the units were "baby elephants." Regardless of what we may or may not have been studying, and/or the presence of fractions in said number. She would've make a very good Dwarf Fortress player.

Gosh, that first sentence looks like butchered grammar. Oh well.
Title: Re: The Measurement Thread
Post by: ILikePie on May 02, 2011, 12:35:55 pm
I like smoots. 1 smoot = 1.7018 meters or 67 inches.
Title: Re: The Measurement Thread
Post by: Ampersand on May 02, 2011, 02:01:11 pm
attoparsecs per microfortnight.

Very nearly 1 inch per second.
Title: Re: The Measurement Thread
Post by: Darvi on May 02, 2011, 02:03:45 pm
Planck time. And I like to measure the time until school's over :V
Title: Re: The Measurement Thread
Post by: Starver on May 02, 2011, 02:45:15 pm
Kelvin. I mean, how hard is it to see the logic in a temperature system where zero is, well... zero?

Then my option of the Delisle scale where 0°K equals approximately 560°De would not impress you, I imagine?  (+560°De)

:)

Other than that, I'm torn between the Thaum, the Helen or the Smoot as my favourite units.

As for measuring, I'm quite happy to consistently remain as very nearly zero Warhols on the fame-o-meter.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 02, 2011, 04:18:49 pm
"Pascals".  Newtons per square centimetre.  Not sure why.

There's also this.  I hear British people still have a problem with metrics.
Maybe the older generation, but with a few exceptions (miles on motorways, pints for drinks in bars) most people have adapted.

I must say, I've always disliked the electronvolt.
It's wonderfully misleading.  For instance, the LHC ramped up to 7 tera-electron volts (or 7,000,000,000,000 electron volts) last year.  Must be huge, right?

Well, in the more usual energy measurement of joules, it's 1122 microjoules (0.000001122J).  In other words, pathetically low.
Title: Re: The Measurement Thread
Post by: Virex on May 02, 2011, 05:40:42 pm
Mind you that's 7 terra-electron volt per particle.

Kelvin. I mean, how hard is it to see the logic in a temperature system where zero is, well... zero?

Then my option of the Delisle scale where 0°K equals approximately 560°De would not impress you, I imagine?  (+560°De)

No, but I'm sure he would accept the Rankine without a hitch :P
Title: Re: The Measurement Thread
Post by: Dr. D on May 02, 2011, 05:58:21 pm
I think if I ever have to take a non-physics class again and it starts making me angry, I will start using really weird units, such as using solar masses to describe the yield of a chemical reaction or electron volts for energy changes in them.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 02, 2011, 06:02:22 pm
Mind you that's 7 terra-electron volt per particle.
Well, yeah, obviously in the context of particle collisions it's HUGE.  But TeV are still pretty small, and it sounds less impressive when measured in joules :P.
Title: Re: The Measurement Thread
Post by: Dr. D on May 02, 2011, 06:03:35 pm
What about foot-pounds?
Title: Re: The Measurement Thread
Post by: Scaraban on May 02, 2011, 06:07:57 pm
I also like the smoot and the hogshead, but no love for the Ohm (what is the keyboard entry for Omega? anyone?)? I am disappoint. The sheppey as well, because sheep are awesome. The helen, for its "history".

My favorite quote relating to measurementis this: "Jeez, it must be 52 degrees in here." "Yes it's chilly professor, but I'm more concerned with why you're using Fahrenheit in the lab." "We all feel in Fahrenheit."
Title: Re: The Measurement Thread
Post by: sonerohi on May 02, 2011, 08:00:19 pm
Furlongs and hectares.
Title: Re: The Measurement Thread
Post by: Megaman on May 02, 2011, 08:01:01 pm
Meters. The master measurement.
Title: Re: The Measurement Thread
Post by: Virex on May 03, 2011, 08:11:34 am
What about foot-pounds?
I'm more fond of pound-moles myself.
Title: Re: The Measurement Thread
Post by: Nikov on May 03, 2011, 11:43:02 am
Imperial. Try cutting a pie into tenths. You cut it in half, then sort of bullshit your way to tenths. Now try cutting another pie into eights. You cut it in half, then in half, then in half, then in half.Which is more practical for daily use, a base ten or a base four system?

After this, roman numerals. I learned how to do large-figure addition and subtraction with them. Its really easy.
Title: Re: The Measurement Thread
Post by: RedKing on May 03, 2011, 11:48:25 am
What about foot-pounds?
I'm more fond of pound-moles myself.

I believe that's also known as the "Whack-A-Mole"  :P
Title: Re: The Measurement Thread
Post by: JoshuaFH on May 03, 2011, 11:51:00 am
Poor Watt-hours, and KiloWatt-hours. Nobody ever remembers them.

Alot of people say watts when they mean Watt-hours, it's such a shame.
Title: Re: The Measurement Thread
Post by: PTTG?? on May 03, 2011, 12:08:26 pm
I like the Astronomical Unit.

Bah! The AU is nothing but a confusing, arbitrary, geocentric measure before the perfect rationality of the light-year.

*ignores the fact that "year" is an arbitrary, geocentric measure.*
Title: Re: The Measurement Thread
Post by: Leafsnail on May 03, 2011, 01:48:58 pm
Imperial. Try cutting a pie into tenths. You cut it in half, then sort of bullshit your way to tenths. Now try cutting another pie into eights. You cut it in half, then in half, then in half, then in half.Which is more practical for daily use, a base ten or a base four system?
Ah yes, imperial, the system of measurements with such brilliant base 4 innovations as 14 pounds in a stone, 3 feet in a yard, 1760 yards in a mile, 5,760 grains to a Troy ounce etc.

I'm not sure when I'd be asked to cut a decipie anyway (I mean, if they wanted eighths, they could just ask for them).
Title: Re: The Measurement Thread
Post by: RedKing on May 03, 2011, 02:00:48 pm
The obvious solution is to view the pie as a single unit which can only be expressed in integer form.

In other words, IT'S MY PIE! ALL MINE! GET YER OWN DAMN PIE!

This solution is valid in either the metric or Imperial system.
Title: Re: The Measurement Thread
Post by: Virex on May 03, 2011, 02:03:02 pm
What about foot-pounds?
I'm more fond of pound-moles myself.

I believe that's also known as the "Whack-A-Mole"  :P
Responding to avoid getting dragged out of my house by the RSPC (http://en.wikipedia.org/wiki/Pound-mole#Other_units_called_.22mole.22)A because there really is a pound-mole
Title: Re: The Measurement Thread
Post by: Dr. D on May 03, 2011, 08:47:25 pm
Another unit I like is the radian, since it is dimensionless. This means, that for certain online physics homework programs, you can multiply your units by radians to an insane number, and still get the correct answer!
Title: Re: The Measurement Thread
Post by: Silfurdreki on May 04, 2011, 04:01:41 am
I like the foe, a unit usually used to measure total energy output of supernovae. It's equal to 1051 ergs or 1044 Joules.

Another good one is the barn (as in: you can't hit the side of a barn!), a unit used to measure cross-section. It's equal to 10-28 m2. Related units are the outhouse (10-34 m2) and the shed (10-52 m2)

I like the Astronomical Unit.

Bah! The AU is nothing but a confusing, arbitrary, geocentric measure before the perfect rationality of the light-year.

*ignores the fact that "year" is an arbitrary, geocentric measure.*

Parsec, my good man, parsec.

*ignores that the parsec assumes a 2 AU baseline, making it yet another arbitrary, geocentric unit*

Yeah... Measuring distances in space without using an arbitrary, geocentric unit is difficult.
Title: Re: The Measurement Thread
Post by: Darvi on May 04, 2011, 04:41:16 am
Planck units are the best! No arbitrary geocentrism involved here!
Title: Re: The Measurement Thread
Post by: Starver on May 04, 2011, 05:24:47 am
Planck units are the best! No arbitrary geocentrism involved here!

"Yes, officer.  I can vaguely describe the man who attacked me.  He was 2.87 Milliard Yotta Planck Lengths in height, his irises were predominantly 470nm in hue and overall I'd say that he was around 57 thousand Yamu.  The only thing I remember from before the incident was him saying mumbling something at about 45dB about 'bloody scientists, overcomplicating things'."
Title: Re: The Measurement Thread
Post by: Virex on May 04, 2011, 06:01:20 am
Another unit I like is the radian, since it is dimensionless. This means, that for certain online physics homework programs, you can multiply your units by radians to an insane number, and still get the correct answer!
You can do that on your exams anyway, because radians are mod 2*pi ;)
Title: Re: The Measurement Thread
Post by: PTTG?? on May 04, 2011, 09:36:41 am
Planck units are the best! No arbitrary geocentrism involved here!

"Yes, officer.  I can vaguely describe the man who attacked me.  He was 2.87 Milliard Yotta Planck Lengths in height, his irises were predominantly 470nm in hue and overall I'd say that he was around 57 thousand Yamu.  The only thing I remember from before the incident was him saying mumbling something at about 45dB about 'bloody scientists, overcomplicating things'."

One of these days I'm going to change by signature to this.
Title: Re: The Measurement Thread
Post by: Darvi on May 04, 2011, 10:20:03 am
One of these days I'm going to change by signature to this.
Derp.
Title: Re: The Measurement Thread
Post by: USEC_OFFICER on May 04, 2011, 10:57:27 am
The lem, one of which is worth 62.5 cm.

(Sure, it's a made up, arbitrary unit of measurement, but it's my made up, arbitrary unit of measurement.)

EDIT: I remembered that it's cm, not mm. Silly me, forgetting my own made up, arbitrary unit of measurement.
Title: Re: The Measurement Thread
Post by: Armok on May 04, 2011, 12:18:11 pm
yea, Planc units are awesome, but a bit impractical.

Measuring things in proton masses, cesium-133 transitions or whatever they are called, and however far light travels in one of those. or maybe something with electron volts, or... Ok, there are loads of random things in that general area you can use.
Title: Re: The Measurement Thread
Post by: rhesusmacabre on May 04, 2011, 01:41:46 pm
Cooking has some fantastic units: the pinch, the glug, the sprinkling, the dash, the knob, the dollop...
Title: Re: The Measurement Thread
Post by: RedKing on May 04, 2011, 02:04:02 pm
And in Southern US cooking, the "mess of" and the "big ol' hunk".

As in, "You get yourself a mess of greens, and put a big ol' hunk of fatback in there and you got some good eating!"

Title: Re: The Measurement Thread
Post by: Myroc on May 04, 2011, 02:23:16 pm
One of these days I'm going to change by signature to this.
I was considering this but I couldn't fit it in between Realmfighter being... Realmfighter and a hilariously out-of-context line about pants.

Also, I find most units of measurement equally badass, atleast the ones within physics. Might have to settle on either the Tesla or the Newton. Indecisiveness galore.
Title: Re: The Measurement Thread
Post by: Grek on May 04, 2011, 02:44:17 pm
The chhd is an excellent unit. It's equal to about 2/3rds of a gallon. The hft is also pretty neat, being approximately the length of a blue whale.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 04, 2011, 05:44:04 pm
Measuring things in proton masses, cesium-133 transitions or whatever they are called, and however far light travels in one of those.
I have an interesting unit here which may fit these requirements:
Quote
the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second.
It may be based on "seconds", but don't worry!  Seconds are actually
"the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom."

So basically... rather than shifting the unit to fit the definition, you shift the definition to fit the previously established unit :P.
Title: Re: The Measurement Thread
Post by: Zrk2 on May 04, 2011, 08:29:23 pm
The hide (a measure of area) it stinks, and it measures!
Title: Re: The Measurement Thread
Post by: Armok on May 05, 2011, 09:05:34 am
 ...    299 792 458 ...
 ... 9 192 631 770 ...
There's a factor of about 10 that needs fixing before that become elegant leafsnail.
Title: Re: The Measurement Thread
Post by: chewie on May 05, 2011, 11:01:08 am
Lightyear. Because of it's definition: "The distance light travels in a year".
Title: Re: The Measurement Thread
Post by: Leafsnail on May 05, 2011, 11:03:05 am
There's a factor of about 10 that needs fixing before that become elegant leafsnail.
A factor of ten?  Sure, let's redefine a metre to be ten centimetres.

...Uh, in more seriousness, every power of ten you take out of the definition makes the unit a power of ten less practical in everyday circumstances.
Title: Re: The Measurement Thread
Post by: Armok on May 05, 2011, 11:36:52 am
I said abaut 10, not exact right. Fine I'll calculate the exact number... 30.663318988
Title: Re: The Measurement Thread
Post by: Haspen on May 05, 2011, 02:16:40 pm
Hmm, Kelvin's, because that Celsius with nicer zero. Metric is generally a nice thing, what with base ten.

What I like to measure? Obviously it's CENSORED :P
Title: Re: The Measurement Thread
Post by: Stone Wera on May 08, 2011, 07:43:07 pm
I don't really have a favorite, but my least favorite is the gram family, milli through kilo. It's too small for me.
Title: Re: The Measurement Thread
Post by: Angel Of Death on May 09, 2011, 09:40:55 am
What I like to measure? Obviously it's CENSORED :P
A strangers face on television? :P
Title: Re: The Measurement Thread
Post by: RedWarrior0 on May 09, 2011, 12:01:26 pm
Favorite mass unit: 9.0 x 1016 Joules. Except that much of the time in school, I don't use scientific notation.
Title: Re: The Measurement Thread
Post by: Hubris Incalculable on May 09, 2011, 12:01:55 pm
Favorite: Tesla. Named after my favorite scientist.

What I like to measure: the distances between my facial features

Err... does what I like to measure have to be in the same units as my favorite measurement?
Title: Re: The Measurement Thread
Post by: JoshuaFH on May 09, 2011, 12:05:58 pm
What about the coulomb? I can't believe I forgot about it. It's one farad, charged to one volt, equal to 6.24150965(16)×10^18 electrons.
Title: Re: The Measurement Thread
Post by: RedWarrior0 on May 09, 2011, 09:12:18 pm
Note: to piss off teachers, use completely badly-chosen units, and get a calculator accurate to that many digits (or just put random shit after about nine digits). So, for instance, use electron masses in gravity problems and light years per nanosecond for velocities in your ordinary kinematics. Alternatively, use imperial and metric units. Take power, for example. Mass times the square of the distance, divided by the cube of the time. Use poundmasses, kilos, outside diameters of your irises, seconds of our time as observed by someone moving .75c relative to us, US Civil War lengths, and revolution periods of an object orbiting the earth at some arbitrary height.

Basically, find two events and a measure between them, and use that as a unit. 
Title: Re: The Measurement Thread
Post by: Starver on May 09, 2011, 10:29:48 pm
That's a cue for...
Spoiler: http://xkcd.com/687/ (click to show/hide)
Title: Re: The Measurement Thread
Post by: Siquo on May 10, 2011, 03:00:55 am
What about the coulomb? I can't believe I forgot about it. It's one farad, charged to one volt, equal to 6.24150965(16)×10^18 electrons.

Oh yeah, the Farad. It always makes me think of bicycles. Why can't we just call it Faraday? Or is three syllables a bit too much? Careful now, if you really want a unit to be named after you, make sure your name does not exceed 2 syllables! *check* Damn, there already is a Faraday. Ok, having multiple units named after you is just showing off.

This guy has got:
Faraday, Farad, Daraf (yeah), Abfarad and Statfarad. And that's just units.
There's also Faraday's law of induction, Faraday effect, Faraday cage, Faraday constant, Faraday cup, Faraday's laws of electrolysis, Faraday paradox, Faraday rotator, Faraday-efficiency effect, Faraday wave, and the Faraday wheel.

Show-off.
Title: Re: The Measurement Thread
Post by: Angel Of Death on May 10, 2011, 03:10:18 am
What about the coulomb? I can't believe I forgot about it. It's one farad, charged to one volt, equal to 6.24150965(16)×10^18 electrons.
Faraday?
It's Faraday!
Faraday!
Gotta get down on Faraday!

(sorry, I couldn't resist.)
Title: Re: The Measurement Thread
Post by: Siquo on May 10, 2011, 03:20:22 am
HE EVEN HAS SONGS (albeit the worst in the world), not too mention a whole day of the week. Does it ever end?

Edit: Oh yeah, and in Germany, they named bicycles after him.
Also streets everywhere in the world, a park in London, a station in Antarctica and numerous other landmarks. And his picture on the 20 quid note. Psh.
Title: Re: The Measurement Thread
Post by: Darvi on May 10, 2011, 09:58:23 am
Edit: Oh yeah, and in Germany, they named bicycles after him.
But they never get his bloody name right.
Title: Re: The Measurement Thread
Post by: ed boy on May 10, 2011, 07:06:10 pm
I recently found this image, which I rather like.

(http://upload.wikimedia.org/wikipedia/commons/c/ca/Vitruvian_Man_Measurements.png)
Title: Re: The Measurement Thread
Post by: Siquo on May 11, 2011, 03:54:53 am
Nice image!
Hmmm, I miss the Dutch Ell (el), but it's about the same as the cubit, although the exact length differs per city or region.
Not to mention the palm, taille, streep or duim and the roede.

*wikis a bit* Damn we had a lot of weird stuff to measure with. Thank Napoleon we got rid of all that.

I also liked the "if you're not with us, you're against us" map:
Spoiler (click to show/hide)
Title: Re: The Measurement Thread
Post by: Duke 2.0 on May 11, 2011, 03:57:47 am
 It appears that highway signs grant you a wonderful striped pattern.
Title: Re: The Measurement Thread
Post by: olemars on May 11, 2011, 04:54:18 am
A norwegian land-mile or "rast" was once defined as the appropriate distance to walk before you can justify taking a break. Nowadays it's just defined as 10 km.
Title: Re: The Measurement Thread
Post by: Virex on May 11, 2011, 06:52:50 am
Nice image!
Hmmm, I miss the Dutch Ell (el), but it's about the same as the cubit, although the exact length differs per city or region.
Not to mention the palm, taille, streep or duim and the roede.

*wikis a bit* Damn we had a lot of weird stuff to measure with. Thank Napoleon we got rid of all that.

I also liked the "if you're not with us, you're against us" map:
Spoiler (click to show/hide)
They don't do measurements in Egypt?
Title: Re: The Measurement Thread
Post by: Duke 2.0 on May 11, 2011, 06:57:07 am
 Their base unit of measurement was changed from the Meter to the Gaddafi.

 Needless to say they are without a system of measurement now.
Title: Re: The Measurement Thread
Post by: Siquo on May 11, 2011, 07:13:10 am
You mean Mubarak...?

Anyway, better map:
Spoiler (click to show/hide)

In Oman and Yemen they also use the metric system, only Liberia and Burma still use their own systems.

The reason those countries were greyed out was because they do use metric, but the date at which it was accepted is unknown.
Title: Re: The Measurement Thread
Post by: RedKing on May 11, 2011, 07:20:47 am
I had no idea Burma had their  own system of measurement (http://en.wikipedia.org/wiki/Burmese_units_of_measurement).

At first, I thought maybe they borrowed from the old Khmer Rouge Cambodian system where everything was measured in skulls.
Title: Re: The Measurement Thread
Post by: Siquo on May 11, 2011, 07:30:23 am
I guess they ran out of skulls again.  ::) They also use both Metric and imperial in official documents, resulting in three systems being in use at the same time.

Liberia (which is mostly ex-Americans) is transitioning to Metric right now, which leaves Burma and the USA as the odd ones out.
Title: Re: The Measurement Thread
Post by: PTTG?? on May 11, 2011, 10:51:59 am
NEEEEEVERRRRR!!!
Title: Re: The Measurement Thread
Post by: Another on May 11, 2011, 01:57:25 pm
"Pascals".  Newtons per square centimetre.  Not sure why.
Pascal is a Newton per square meter. Sorry, my eyes just tripped over this.

I kind of prefer just "units". As in dimensionless quantities that can be freely logarithmed when needed.

By the way a joke about the Metric system:
-What is a horsepower in the metric system?
-By definition it is the power generated by a horse with height of 1 meter and mass of 1 kilogram.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 11, 2011, 02:23:17 pm
I'm not sure why I even said centimetre, since that clearly wouldn't make sense.  Huh.
Title: Re: The Measurement Thread
Post by: Virex on May 11, 2011, 02:31:47 pm
Lots of things are still defined per liter (such as molarity. How is that in imperial units anyway? pound-moles per gallon?) which doesn't make much sense either.
Title: Re: The Measurement Thread
Post by: Starver on May 11, 2011, 03:50:02 pm
Lots of things are still defined per liter (such as molarity. How is that in imperial units anyway? pound-moles per gallon?) which doesn't make much sense either.
A litre[1] is a 10x10x10cm cube, (a cubic decimetre), which may seem a bit strange and non-SI (cubic metres would be more in line, one thousand times the volume), but a litre of water weighs (under normal Earth gravity) exactly 1kg, the SI unit of weightmass[2].  This is no coincidence. 

A cubic metre of water weighs (with the same caveat) a tonne, otherwise known as a megagramme, but it's also 'nicer' to have a handy-sized litre as opposed to something 1,000 times the volume but which would often used to measure household volumes of liquid where people appreciate a more simple order of number.  Although I suppose they could have gone the same route as the kilogramme itself, which is the primary SI magnitude of mass rather than the non-prefixed gram (that being much too small for household quantities, save in the order of 100s (10s at a push for some things, unit numbers only rarely so) at a time).

[1] Or on your side of the pond, presumably: liter... but my spill-chucker rebels over that variant.  As much as yours would mine, I suspect. :)

[2] Weight and mass being so synonymous, I momentarily made that error.  Other similar ones may be found drizzled throughout my prose!  YKWIM, though...
Title: Re: The Measurement Thread
Post by: Darvi on May 11, 2011, 04:21:20 pm
I always found it weird that a kilogram is SI but a kilometer ain't.
Title: Re: The Measurement Thread
Post by: RedWarrior0 on May 11, 2011, 04:41:35 pm
Second, kilogram, and meter are SI. Everything else is accepted (dB, K, oC, etc.) or derived.
Title: Re: The Measurement Thread
Post by: Virex on May 11, 2011, 04:48:06 pm
You're forgetting the ampere, the kelvin (can't derive temperature from time, mass and distance that easily), the candela and the mol
Title: Re: The Measurement Thread
Post by: Darvi on May 11, 2011, 04:50:34 pm
Actually the mole is derived from mass.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 11, 2011, 04:56:07 pm
I always found it weird that a kilogram is SI but a kilometer ain't.
Yeah - you'd kindof expect them to call the SI one grams in the first place.  It's also weird because it's defined by an artifact (so you have a block of metal that is the kilogram) rather than a constant.

Actually the mole is derived from mass.
It involves "kilogram" in its definition, yeah, but it still needs a definition rather than just "Unit X divided by unit Y", so it's a base unit.
Title: Re: The Measurement Thread
Post by: Darvi on May 11, 2011, 05:08:21 pm
I always thought a mole was 1/mass of a proton.
Title: Re: The Measurement Thread
Post by: Leafsnail on May 11, 2011, 05:16:41 pm
"A mole is a number of particles equal to the 1/12 of the number of atoms in 12g of carbon-12" is the definition I have on tap for my current chemistry test :P.

I guess 1/mass of a proton is basically it though, although the fact you have to bring mass of a proton into it at all makes it a base unit.
Title: Re: The Measurement Thread
Post by: olemars on May 11, 2011, 05:28:04 pm
That's incorrect. One mole is the amount you have of a substance if you have a number of particles of it equal to avogadro's constant. The formal definition is the number of atoms in 12g of carbon-12. So you have one mole of something if you have 6.02214078×10^23 particles of it.
Title: Re: The Measurement Thread
Post by: Darvi on May 11, 2011, 05:30:02 pm
Yes, but that constant got defined using mass, right?

Actually, wikipedia says so too. (http://en.wikipedia.org/wiki/New_SI_definitions#Mole)
Title: Re: The Measurement Thread
Post by: olemars on May 11, 2011, 05:42:32 pm
Sure, but the mole as a unit is just a count, basically multiples of avogadro.
Title: Re: The Measurement Thread
Post by: Muz on May 11, 2011, 11:12:25 pm
The Urist, obviously.

Haha, I probably missed out some meme around here, but I remember when some of us B12ers got onto a RPG and used Urists to measure tiles.

BTW, favorite unit is Kelvin. So elegant.