[ltp] how to start with thinkpad T60?

[Mario Butter]

Actually, the original Celsius scale was based on the freezing and
boiling points of water. However, these vary depending on atmospheric
pressure, so the original scale is calibrated pretty much as
accurately as Fahrenheit. Also, the original Kelvin scale was based on
the *assumed* point of absolute zero, and used the same unit value as
Celsius. It was not until fairly recently (1954) that a fairly
concrete definition for the Kelvin scale was chosen - the triple point
of water (TPW) - and this was "assigned" the value of 273.16 Kelvin.
However, since TPW has some fluctuation in measurement, you cannot say
that either Celsius or Kelvin is tied a fundamental constant. There is
a current discussion in the SI community about tying Kelvin to a
fundamental constant, but no agreement has been reached.

And nothing you have said indicates that using Fahrenheit is somehow
"backward." At best, since you claim that accuracy is not issue and
there is no fundamental constant as reference, you're arguing that
anyone who thinks differently from you is "backward."


On Feb 17, 2008 2:29 PM, James Knott <james.knott@rogers.com> wrote:
> Mario Butter wrote:
> > Oh, and BTW, can you explain why the Celcius scale is better than the
> > Fahrenheit scale?
> >
>
> Well, as I understand it, there is no definite method known, that
> Fahrenheit used to calibrate his scale, other than noting things he
> thought were hot or cold etc.  On the other hand the Celcius scale has
> precisely defined points, based on the Kelvin scale, which in turn
> relates to temperature above absolute zero.  The 0 & 100 degree points
> originally referred to the freezing and boiling points of water, under
> specified test conditions.  Those points have been slightly revised to
> bring the scale in line with Kelvin.  Further, virtually all of the
> measurement systems used in science are tied together through the metric
> system, precisely defined and traceable back to some fundamental
> constants.  No such relationship exists in imperial measure, which often
> varies around the world. i.e the U.S. and British gallons are different
> sizes.  There are different miles, depending on who does the measuring
> and so on.
>
> As far as the marks on the side of a thermometer go, there's no
> difference, as the precision of either can be extended simply by using
> more digits, provided the thermometer is capable of supporting that
> precision.  But to simply say the Fahrenheit scale is more accurate,
> because there are more degrees on it is absolute nonsense.
>
>
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>
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-- 
Mario

http://mario.silent-tower.org/