Change from Celsius to Fahrenheit?

[erocker]

I understand where you are coming from, and you are right, just not sure of the actual relevance in real world scenarios, what I mean by that is, if you go out this weekend and run a marathon, some might say you have run 42.195km, others may say they have run 26 miles and 385 yards, whichever way you care to call it, you have run the same distance . Of course if you were getting dirty with something like micro physics where you were talking tiny fractions of a unit then yes most certainly having that added detail will make life easier, but not sure if it makes it more accurate.

It really just comes down to what you grew up with. I prefer the metric system in pretty much all ways (as a mechanic, it's just easier to remember what's what)... Except I just can't use Celsius in daily life. If someone here asked me what temperature it was be it outside or.. say an engine, if I gave them the info in Celsius they'd look at me like I have lobsters crawling out of my ears! Fahrenheit (with the exception of PC's) are ingrained in my head. I couldn't tell you the temperature here in C, but I can say it does feel like a very nice 72 degrees. 40 years of this stuff forced into me head.

 

[lilhasselhoffer]

Metric is more precise, water freezes at 0ºC (32ºF) and boils at 100ºC (212ºF). Simple.

No. Stop trying to science.


Precision and accuracy have nothing to do with the software. The accuracy would measure the deviation between reported temperature and actual temperature, while precision would measure how the reported temperature varied with a consistent real temperature. What we are asking for is which scale we are going to use. Is it one that arbitrarily sets 0 at the freezing temperature of water, or one that arbitrarily sets 0 at brine freezing temperature (and 100 at human body temperature).

If we are trying to make the argument for more gradients within the same measurement, then Fahrenheit wins. If we are trying to make the argument for which scale conforms to most existing specifications Celsius wins. If we want to be pedantic engineers (looks both ways, knowing they are guilty of this), we choose Rankine or Kelvin because temperature is a measurement of random kinetic energy and those scales have no motion as 0.




Science aside, Celsius wins hands down for me. Fahrenheit may have more gradients, but that's why we have decimal places. This assertion is coming from a person who has spent long enough in the engineering fields to know that the imperial system was thought up by a drunkard. No other explanation could possibly cover a numerical base 10 system, with a measurement system based on arbitrary crap (screw you furlong, rod, and yard).

 

[qubit]

40 years of this stuff forced into me head.

Oh, so you're another old fart! Me too. You've just gone up in my estimation.

Ya know, I'm metric in everything but speed. It's got to be mph. I can estimate a conversion of kph to mph in my head fairly easily, but it just feels totally wrong. I guess it's like this for me because that's how things are measured in daily life here in England.

 

[R-T-B]

I understand where you are coming from, and you are right, just not sure of the actual relevance in real world scenarios, what I mean by that is, if you go out this weekend and run a marathon, some might say you have run 42.195km, others may say they have run 26 miles and 385 yards, whichever way you care to call it, you have run the same distance . Of course if you were getting dirty with something like micro physics where you were talking tiny fractions of a unit then yes most certainly having that added detail will make life easier, but not sure if it makes it more accurate.

You didn't pay attention much in science class did you?

Precision is exactly what I just described (unit size) in a scientific context... you want to get as close to the target as possible, so to speak. Either that or my science teacher was full of BS, which is possible.

 

[Caring1]

There are two different kinds of countries in this world. Countries that use the metric system and countries that went to the moon.

Typical Imperialistic attitude.

 

[lilhasselhoffer]

You didn't pay attention much in science class did you?

Precision is exactly what I just described (unit size) in a scientific context... you want to get as close to the target as possible, so to speak. Either that or my science teacher was full of BS, which is possible.

Yes and no.

Imagine two targets. You get to fire two guns at the target. The first has rifling, and the other is smooth barrel. After five shots of each gun you compare the targets. The gun with rifling has a grouping with a diameter of 3", but is centered 4" from the bulls eye. This group is very precise, but not accurate. Your smooth barrel has produced a grouping with diameter 5", but the center of the grouping is dead on the bulls eye. This group is accurate, but not precise.


Now that we've established the basics of precision and accuracy, let's apply it to our example. Your CPU is actually 45 C. This is under a constant loading, so the temperature is constant. An accurate reading would vary between 44-46 C, assuming a variability in the sensor of +/-1 C. You could get a very precise reading of 43 C consistently, but it would not be accurate.


In short, neither Fahrenheit or Celsius is more accurate. They are scales, which by nature have no accuracy (they are based on arbitrary stuff). Our equipment determines accuracy and precision.

 

[R-T-B]

Sounds about right, thanks.

 

[Caring1]

*Flies off in Metric Deathstar to battle Imperial forces*

 

[silkstone]

You didn't pay attention much in science class did you?

Precision is exactly what I just described (unit size) in a scientific context... you want to get as close to the target as possible, so to speak. Either that or my science teacher was full of BS, which is possible.

Precision actually describes the spread of repeated measurements. Accuracy is how close the measurement are to the actual (true) value.

The system of unit makes no difference to either. The sensitivity of instrument does.

Edit - lilhasslehoffer beat me to it. Dang.

 

[R-T-B]

Precision actually describes the spread of repeated measurements. Accuracy is how close the measurement are to the actual (true) value.

The system of unit makes no difference to either. The sensitivity of instrument does.

Edit - lilhasslehoffer beat me to it. Dang.

Yeah, I had a sneaking suspicion my high school science teacher was oversimplifying things... Not surprised to have it confirmed... Lol

 

[Tatty_Two]

Yeah, I had a sneaking suspicion my high school science teacher was oversimplifying things... Not surprised to have it confirmed... Lol

I was self taught so that's my excuse and I am sticking to it!