Arizona Looking to Dump Metric Signage on I-19

[Scott5114]

mmHg is clearly metric.

It uses a metric unit, but the official SI unit of pressure is the bar (which equals air pressure at sea level). Meteorology typically uses mbars for all air-pressure readings on the back end, and only translates them to inHg when communicating with the general public.

[kphoger]

Healthcare is (usually) metric ... but uses English for pressures (mmHg) ...

mmHg is clearly metric.

It uses a metric unit, but the official SI unit of pressure is the bar (which equals air pressure at sea level).

So actually, he was incorrect on two counts:

(1)  mmHg is a metric unit, therefore its use is not an exception to the rule of using metric.  (Note that he did not claim it was an SI unit.)

(2)  mmHg is not the English Customary unit for pressure.  Imperial uses psi.

[hotdogPi]

mmHg is clearly metric.

It uses a metric unit, but the official SI unit of pressure is the bar (which equals air pressure at sea level). Meteorology typically uses mbars for all air-pressure readings on the back end, and only translates them to inHg when communicating with the general public.

I seem to remember the SI unit being the pascal, defined as 1 kg/(m·s²). One bar is defined as exactly 100,000 pascals (which still works with SI because it's a power of 10); air pressure at sea level is pretty close to this (but not exact) at 101,325 pascals.

[kkt]

Healthcare is (usually) metric ... but uses English for pressures (mmHg) ...

mmHg is clearly metric.

It uses a metric unit, but the official SI unit of pressure is the bar (which equals air pressure at sea level).

So actually, he was incorrect on two counts:

(1)  mmHg is a metric unit, therefore its use is not an exception to the rule of using metric.  (Note that he did not claim it was an SI unit.)

(2)  mmHg is not the English Customary unit for pressure.  Imperial uses psi.

Inches of mercury used to be used for weather reporting.

[GaryV]

Inches of mercury used to be used for weather reporting

Weather.com still does. And I'm sure that's not the only place I've seen it.

[kphoger]

Meteorology typically uses mbars for all air-pressure readings on the back end, and only translates them to inHg when communicating with the general public.

mmHg is not the English Customary unit for pressure.  Imperial uses psi.

Inches of mercury used to be used for weather reporting.

Yes, as Scott had already mentioned.  But, of course, this does not change the fact that mmHg is not the Customary unit.

[US 395]

In a fictional world, 17 and 19 would be one long interstate.

In a fictional world, it could've been Interstate 15. If you go north from the end of Interstate 17 in Flagstaff, you'd eventually run into 15 and SLC. The way 15 goes south from there (more like southwest), that could've been an Interstate 11. Still fits the overall grid.🤷🏻�♂️

[The Ghostbuster]

In a non-fictional world, we have this: https://www.aaroads.com/forum/index.php?board=20.0.

[Max Rockatansky]

In a non-fictional world, we have this: https://www.aaroads.com/forum/index.php?board=20.0.

If we are living in a simulation doesn't that mean what we call the "real world" is actually also fictional? 

[kkt]

In a fictional world, 17 and 19 would be one long interstate.

In a fictional world, it could've been Interstate 15. If you go north from the end of Interstate 17 in Flagstaff, you'd eventually run into 15 and SLC. The way 15 goes south from there (more like southwest), that could've been an Interstate 11. Still fits the overall grid.🤷🏻�♂️

If you go north past the end of I-17 you run into very rough, sparsely populated country, and then Lake Powell.  The need for interstates is not a perfect grid - Salt Lake City to Las Vegas to L.A. is a diagonal, but it is heavily used.

If we are living in a simulation doesn't that mean what we call the "real world" is actually also fictional? 

Are you getting all Matrixy on us?

[Max Rockatansky]

Nah, I had the idea of some weird alien kid playing a hyper detailed version of The Sims in mind.