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Old September 12th, 2013, 09:56 AM   #21841
g.spinoza
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Quote:
Originally Posted by bogdymol View Post
1 Celsius degree precision is enough for me right now.
Commercial medical thermometers are down to 0.1 °C. Having 37°C or 38°C is a big difference
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Old September 12th, 2013, 11:01 AM   #21842
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So where I could use thermometer that shows difference between 21.4185 and 21.4186°C?

(PS. Actually I know )
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Old September 12th, 2013, 11:05 AM   #21843
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Errors are cumulative. If your thermometer is off by one millikelvin every kelvin, at 1000 degrees you'll measure 999.
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Old September 12th, 2013, 11:10 AM   #21844
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999 or 1000 is the same: hot
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Old September 12th, 2013, 02:29 PM   #21845
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Quote:
Originally Posted by g.spinoza View Post
Commercial medical thermometers are down to 0.1 °C. Having 37°C or 38°C is a big difference
Which is why Fahrenheit's better.

(Seriously, though. If you limit yourself to whole numbers like the typical weather report, there are 18 possible values in Fahrenheit to every 10 in Celsius. Just sayin'....)
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Old September 12th, 2013, 02:34 PM   #21846
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As newly appointed metrologist (is that a word?), who hasn't signed his contract yet, I can officially and scientifically say that Fahrenheit is lame.
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Old September 12th, 2013, 02:44 PM   #21847
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Yayyy! We can begin a new war SI vs. weird imperial units!
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Old September 12th, 2013, 02:45 PM   #21848
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Quote:
Originally Posted by Wilhem275 View Post
Yayyy! We can begin a new war SI vs. weird imperial units!
It's no war when forces on display are so different. It's a blitzkrieg!
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Old September 12th, 2013, 02:47 PM   #21849
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It's only an issue when conformity-fetishists make it one. :-P

EDIT: Arrows for Wilhem, but I think it still works.
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Old September 12th, 2013, 02:49 PM   #21850
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Quote:
Originally Posted by g.spinoza View Post
It's no war when forces on display are so different. It's a blitzkrieg!
Geez, you applied Godwin's law pretty fast, didn't you?
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Old September 12th, 2013, 02:52 PM   #21851
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Originally Posted by Penn's Woods View Post
It's only an issue when conformity-fetishists make it one. :-P
Or when a multimillion space probe gets lost in the heavens because half of its systems uses imperial units

https://en.wikipedia.org/wiki/Mars_Climate_Orbiter

But I guess the problem was that half of its systems used SI units, wasn't it?
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Old September 12th, 2013, 02:54 PM   #21852
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Quote:
Originally Posted by Wilhem275 View Post
Geez, you applied Godwin's law pretty fast, didn't you?
Blitzkrieg was invented in 1914. Hitler was still painting walls in Austria
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Old September 12th, 2013, 02:54 PM   #21853
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Quote:
Originally Posted by Penn's Woods View Post
Which is why Fahrenheit's better.

(Seriously, though. If you limit yourself to whole numbers like the typical weather report, there are 18 possible values in Fahrenheit to every 10 in Celsius. Just sayin'....)
A little experiment: if, at the moment, you look at the Weather Channel's ten-day forecast for Philadelphia (http://www.weather.com/weather/tenda...+PA+19103:4:US), you see highs for Friday, Sunday and Monday of 75, 76 and 74. If you switch it to Celsius - an option they do give you - those three values become two: two 24s and a 23.

(Of course, it cuts the other way with miles and kilometers, but I'm going to pretend I didn't realize that.)

EDIT: Any way you measure it, those temperatures are much more reasonable for September than the 93F/34C we had yesterday, with high humidity.
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Old September 12th, 2013, 02:57 PM   #21854
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Quote:
Originally Posted by g.spinoza View Post
Or when a multimillion space probe gets lost in the heavens because half of its systems uses imperial units

https://en.wikipedia.org/wiki/Mars_Climate_Orbiter

But I guess the problem was that half of its systems used SI units, wasn't it?
Got to the moon using miles....

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Old September 12th, 2013, 02:58 PM   #21855
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Quote:
Originally Posted by Penn's Woods View Post
A little experiment: if, at the moment, you look at the Weather Channel's ten-day forecast for Philadelphia (http://www.weather.com/weather/tenda...+PA+19103:4:US), you see highs for Friday, Sunday and Monday of 75, 76 and 74. If you switch it to Celsius - an option they do give you - those three values become two: two 24s and a 23.
The mistake is before that. It makes no sense in giving predictions in temperature down to the degree, Fahrenheit or Celsius. If you want to be scientific, you should provide a level of confidence for your prediction, or a so called "fork" (i.e. temperature is expected to be in the range 72-78 with 95% probability). If you don't want to be scientific, then 75 or 76 makes absolutely no difference
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Old September 12th, 2013, 03:06 PM   #21856
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Exactly. The World would be such a better place if there were mass knowledge about the concept (just the general concept, not the inner workings) of probability distribution...
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Old September 12th, 2013, 03:28 PM   #21857
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Gaussian distribution...

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Old September 12th, 2013, 04:33 PM   #21858
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Quote:
Originally Posted by Wilhem275 View Post
Yayyy! We can begin a new war SI vs. weird imperial units!
I do object to the term "imperial," though. The Empire is dead. Don't tell Road_UK. :-)
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Old September 12th, 2013, 05:47 PM   #21859
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That's ok. If there'd be a British emperor left, it'd probably have no clothes on.
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Old September 12th, 2013, 07:29 PM   #21860
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https://en.wikipedia.org/wiki/Gimli_Glider
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“The transponder’s personalised signal would be picked up when the car passed through an intersection, and then relayed to a central computer which would calculate the charge according to the intersection and the time of day and add it to the car’s bill” - Nobel Economics Prize winner William Vickrey, proposing a system of electronic tolling for the Washington metropolitan area, 1959
In real life, electronic toll collection was first introduced in Bergen, Norway in 1986, and well into the 21th century many countries still struggle to implement it.
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