Torr and mmHg ??

General discussion about calculators, Swiss Micros or otherwise
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Walter
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Re: Torr and mmHg ??

Post by Walter » Fri Jun 26, 2020 8:46 pm

ijabbott wrote:
Wed Jun 24, 2020 9:55 pm
Walter wrote:
Tue Jun 23, 2020 10:07 am
Jaymos wrote:
Mon Jun 22, 2020 11:21 pm
... NIST throws away the digits saying compressibility of mercury is varying. But at the same time they also don't chop off c's digits because of uncertainty to the medium ...
Not sure I got your point. What c are you talking about? :?
The c I know is speed of light in vacuum - no medium per definition. Thanks in advance for enlightenment (pun intended). 8-)
And c is now fixed to an exact value by definition of the SI base units, so there is no longer any room for uncertainty.
I concur fullheartedly. Thus, when it comes to international measuring standards and national standard institutes, common engineers should become very careful.
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ctrclckws
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Re: Torr and mmHg ??

Post by ctrclckws » Fri Jun 26, 2020 9:24 pm

akaTB wrote:
Mon Jun 22, 2020 10:03 pm
ctrclckws wrote:
Mon Jun 22, 2020 9:40 pm
That graph is a lovely example of why the metric system should be the standard.
It already is. Then someone prefers to go otherwise... :roll:
Unfortunately, not where I live. Thank you. Thomas Jefferson.
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Thomas Okken
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Re: Torr and mmHg ??

Post by Thomas Okken » Fri Jun 26, 2020 11:18 pm

In fairness to the United States, it should be recognized that it is a lot easier to adopt a standard where there wasn't one before, than it is to replace an existing standard with a new one. The Imperial Units were well-established long before the metric system was introduced, and switching to metric now would create an enormous amount of hassle. As much as I find the metric system superior, I really can't fault the people of my second home country for sticking with what they have.

Flame away! :mrgreen:

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Re: Torr and mmHg ??

Post by ctrclckws » Sat Jun 27, 2020 12:35 am

No flames. With all the tools, etc. It would be hard to switch now. But, at least lables include both. Some roads have dual speed limits.
Cars can be mixed systems. So a mechanic may need both sets of tools.

But if it were done when Jefferson was President, there would have been a lot less things to change.
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Thomas Okken
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Re: Torr and mmHg ??

Post by Thomas Okken » Sat Jun 27, 2020 7:27 am

According to this, he was interested in doing so, but it must not have been a very high priority:

https://www.npr.org/sections/thetwo-way ... ric-system

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akaTB
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Re: Torr and mmHg ??

Post by akaTB » Sat Jun 27, 2020 10:09 am

Thomas Okken wrote:
Fri Jun 26, 2020 11:18 pm
In fairness to the United States, it should be recognized that it is a lot easier to adopt a standard where there wasn't one before, than it is to replace an existing standard with a new one. The Imperial Units were well-established long before the metric system was introduced, and switching to metric now would create an enormous amount of hassle.
Yes, sure.
And this is what we are still using nowadays here, in Italy.
https://en.wikipedia.org/wiki/Ancient_R ... easurement :lol:

C'mon.
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Thomas Okken
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Re: Torr and mmHg ??

Post by Thomas Okken » Sat Jun 27, 2020 2:30 pm

I don't think Italy is full of millions of houses that were built out of lumber cut to Roman-era units.

C'mon.

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akaTB
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Re: Torr and mmHg ??

Post by akaTB » Sat Jun 27, 2020 4:47 pm

Thomas Okken wrote:
Sat Jun 27, 2020 2:30 pm
I don't think Italy is full of millions of houses that were built out of lumber cut to Roman-era units.

C'mon.
But we, and the rest of the world too, did use old units until embracing the new ones.
Nobody was harmed in the process, maybe confused at most.

C'mon²
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Thomas Okken
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Re: Torr and mmHg ??

Post by Thomas Okken » Sat Jun 27, 2020 6:31 pm

Sure, back in the days before everything was built out of standard-sized parts.

But hey, if you really want to believe in a narrative, you'll do it no matter what, so never mind...

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akaTB
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Re: Torr and mmHg ??

Post by akaTB » Sat Jun 27, 2020 6:59 pm

Yep, the good ol 'back in the days'...
So nothing can ever change anymore.

But hey, if you really want to live in autarchy in a closed system, good for you: the rest of the world is going elsewhere.
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