On 2021-11-15 12:21, Tom Gardner wrote:> On 15/11/21 10:51, Sylvia Else wrote: >> On 14-Nov-21 9:32 pm, Clive Arthur wrote: >>> On 13/11/2021 23:47, John Robertson wrote: >>> >>> <snip> >>> >>>> I had the capitals incorrect - I put mHz, he corrected to MHz, MHZ is also correct. mHz is just wrong... >>>> >>>> https://www.abbreviations.com/abbreviation/MegaHertz >>>> >>>> FFF is For F...(s) Sake. >>>> >>>> John ;-#)# >>> >>> MHZ is certainly not correct! >>> >>> mHz (millihertz) is commonly used in seismometry for example. >>> >>> Basic stuff like this matters. >>> >> >> Yes. >> >> Every time I read about a power station producing some number of mW, I wonder whether someone got scammed. >> >> Sylvia. > > It is a useful "bozo filter", as is confusing MW and MWh.I'd want to see SI used everywhere. The currently accepted radius of the observable universe is about 130Ym. Hubble's constant is about 2.3aHz. Stamp out weird units! We need a different name for the kg. We shouldn't have basic units with baked-in multiplier prefixes. Jeroen Belleman
Problems we don't need
Started by ●November 10, 2021
Reply by ●November 15, 20212021-11-15
Reply by ●November 15, 20212021-11-15
On Monday, November 15, 2021 at 7:21:44 AM UTC-4, Tom Gardner wrote:> On 15/11/21 10:51, Sylvia Else wrote: > > On 14-Nov-21 9:32 pm, Clive Arthur wrote: > >> On 13/11/2021 23:47, John Robertson wrote: > >> > >> <snip> > >> > >>> I had the capitals incorrect - I put mHz, he corrected to MHz, MHZ is also > >>> correct. mHz is just wrong... > >>> > >>> https://www.abbreviations.com/abbreviation/MegaHertz > >>> > >>> FFF is For F...(s) Sake. > >>> > >>> John ;-#)# > >> > >> MHZ is certainly not correct! > >> > >> mHz (millihertz) is commonly used in seismometry for example. > >> > >> Basic stuff like this matters. > >> > > > > Yes. > > > > Every time I read about a power station producing some number of mW, I wonder > > whether someone got scammed. > > > > Sylvia. > It is a useful "bozo filter", as is confusing MW and MWh.I deal with kW and kWh every week and once in a while I'll forget the "h" part. It's an easy mistake to make. It's funny that we use a compound term for energy and a specific term for rate of energy with EVs. It makes it a bit harder to explain to people who are not familiar with the terms. It is natural to compare them to distance and speed where the compound unit is the rate term, MPH or kPH. -- Rick C. + Get 1,000 miles of free Supercharging + Tesla referral code - https://ts.la/richard11209
Reply by ●November 15, 20212021-11-15
On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote:> On 2021-11-15 12:21, Tom Gardner wrote: > > On 15/11/21 10:51, Sylvia Else wrote: > >> On 14-Nov-21 9:32 pm, Clive Arthur wrote: > >>> On 13/11/2021 23:47, John Robertson wrote: > >>> > >>> <snip> > >>> > >>>> I had the capitals incorrect - I put mHz, he corrected to MHz, MHZ is also correct. mHz is just wrong... > >>>> > >>>> https://www.abbreviations.com/abbreviation/MegaHertz > >>>> > >>>> FFF is For F...(s) Sake. > >>>> > >>>> John ;-#)# > >>> > >>> MHZ is certainly not correct! > >>> > >>> mHz (millihertz) is commonly used in seismometry for example. > >>> > >>> Basic stuff like this matters. > >>> > >> > >> Yes. > >> > >> Every time I read about a power station producing some number of mW, I wonder whether someone got scammed. > >> > >> Sylvia. > > > > It is a useful "bozo filter", as is confusing MW and MWh. > I'd want to see SI used everywhere. The currently accepted > radius of the observable universe is about 130Ym. Hubble's > constant is about 2.3aHz. > > Stamp out weird units! We need a different name for the kg. > We shouldn't have basic units with baked-in multiplier prefixes.Isn't 'g' the basic unit??? -- Rick C. -- Get 1,000 miles of free Supercharging -- Tesla referral code - https://ts.la/richard11209
Reply by ●November 15, 20212021-11-15
On 15/11/2021 12:28, Rick C wrote:> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote:<snip>>> >> Stamp out weird units! We need a different name for the kg. >> We shouldn't have basic units with baked-in multiplier prefixes. > > Isn't 'g' the basic unit??? >Yes, but it's the MKS system. Would have been neater if the gram was a thousand times bigger. As for the Are, that should have been 1 m^2. -- Cheers Clive
Reply by ●November 15, 20212021-11-15
On 2021-11-15 13:52, Clive Arthur wrote:> On 15/11/2021 12:28, Rick C wrote: >> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote: > > <snip> >>> >>> Stamp out weird units! We need a different name for the kg. >>> We shouldn't have basic units with baked-in multiplier prefixes. >> >> Isn't 'g' the basic unit??? >> > > Yes, but it's the MKS system. Would have been neater if the gram was a thousand times bigger. > > As for the Are, that should have been 1 m^2. >In SI, the kg is the base unit. It was recently redefined to be based on some fundamental constants of nature, rather than on the mass of a lump of metal in a vault near Paris. The mks system is another thing that should be abandoned. For some weird reason, it's still popular with cosmologists. Jeroen Belleman
Reply by ●November 15, 20212021-11-15
On 15.11.21 15.05, Jeroen Belleman wrote:> On 2021-11-15 13:52, Clive Arthur wrote: >> On 15/11/2021 12:28, Rick C wrote: >>> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote: >> >> <snip> >>>> >>>> Stamp out weird units! We need a different name for the kg. >>>> We shouldn't have basic units with baked-in multiplier prefixes. >>> >>> Isn't 'g' the basic unit??? >>> >> >> Yes, but it's the MKS system. Would have been neater if the gram was >> a thousand times bigger. >> >> As for the Are, that should have been 1 m^2. >> > > In SI, the kg is the base unit. It was recently redefined to > be based on some fundamental constants of nature, rather than > on the mass of a lump of metal in a vault near Paris. > > The mks system is another thing that should be abandoned. > For some weird reason, it's still popular with cosmologists. > > Jeroen BellemanYou may mix up mks and cgs systems. The old physycist system is cgs. MKS evolved to SI. -- -TV
Reply by ●November 15, 20212021-11-15
On Monday, November 15, 2021 at 2:24:44 PM UTC-4, Tauno Voipio wrote:> On 15.11.21 15.05, Jeroen Belleman wrote: > > On 2021-11-15 13:52, Clive Arthur wrote: > >> On 15/11/2021 12:28, Rick C wrote: > >>> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote: > >> > >> <snip> > >>>> > >>>> Stamp out weird units! We need a different name for the kg. > >>>> We shouldn't have basic units with baked-in multiplier prefixes. > >>> > >>> Isn't 'g' the basic unit??? > >>> > >> > >> Yes, but it's the MKS system. Would have been neater if the gram was > >> a thousand times bigger. > >> > >> As for the Are, that should have been 1 m^2. > >> > > > > In SI, the kg is the base unit. It was recently redefined to > > be based on some fundamental constants of nature, rather than > > on the mass of a lump of metal in a vault near Paris. > > > > The mks system is another thing that should be abandoned. > > For some weird reason, it's still popular with cosmologists. > > > > Jeroen Belleman > You may mix up mks and cgs systems. The old physycist system is > cgs. MKS evolved to SI.I have a physics text somewhere with cgs in it. The professor told us that Metric was replacing it though, so he would not be teaching those units. -- Rick C. -+ Get 1,000 miles of free Supercharging -+ Tesla referral code - https://ts.la/richard11209
Reply by ●November 16, 20212021-11-16
On 16.11.21 2.51, Rick C wrote:> On Monday, November 15, 2021 at 2:24:44 PM UTC-4, Tauno Voipio wrote: >> On 15.11.21 15.05, Jeroen Belleman wrote: >>> On 2021-11-15 13:52, Clive Arthur wrote: >>>> On 15/11/2021 12:28, Rick C wrote: >>>>> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman wrote: >>>> >>>> <snip> >>>>>> >>>>>> Stamp out weird units! We need a different name for the kg. >>>>>> We shouldn't have basic units with baked-in multiplier prefixes. >>>>> >>>>> Isn't 'g' the basic unit??? >>>>> >>>> >>>> Yes, but it's the MKS system. Would have been neater if the gram was >>>> a thousand times bigger. >>>> >>>> As for the Are, that should have been 1 m^2. >>>> >>> >>> In SI, the kg is the base unit. It was recently redefined to >>> be based on some fundamental constants of nature, rather than >>> on the mass of a lump of metal in a vault near Paris. >>> >>> The mks system is another thing that should be abandoned. >>> For some weird reason, it's still popular with cosmologists. >>> >>> Jeroen Belleman >> You may mix up mks and cgs systems. The old physycist system is >> cgs. MKS evolved to SI. > > I have a physics text somewhere with cgs in it. The professor told us that Metric was replacing it though, so he would not be teaching those units.About a half century ago, I hated Kittel's book on solid state physics due to the use of the cgs system with the annoying electrical units with the mess of 2 * pi and 4 * pi there and here. I sure hope that the units are history and stay there. -- -TV
Reply by ●November 16, 20212021-11-16
On 2021/11/13 7:54 p.m., DecadentLinuxUserNumeroUno@decadence.org wrote:> Sylvia Else <sylvia@email.invalid> wrote in > news:ivbduhFqd0eU1@mid.individual.net: > >> On 14-Nov-21 10:47 am, John Robertson wrote: >>> >>> On 2021/11/13 3:37 p.m., Sylvia Else wrote: >>>> On 14-Nov-21 10:36 am, Clive Arthur wrote: >>>>> On 12/11/2021 15:59, John Robertson wrote: >>>>> >>>>> <snip> >>>>>> >>>>>> How about just build a short BNC plug and receptacle >>>>>> extension, with a short length of cable between them? As you >>>>>> say it is only 20mHz... >>>>>> >>>>>> John :-#)# >>>>> >>>>> No, 20 MHz. FFS. >>>>> >>>> >>>> What does that mean? >>>> >>>> Sylvia. >>> >>> I had the capitals incorrect - I put mHz, he corrected to MHz, >>> MHZ is also correct. mHz is just wrong... >>> >>> https://www.abbreviations.com/abbreviation/MegaHertz >>> >>> FFF is For F...(s) Sake. >>> >>> John ;-#)# >> >> Oh, yes. Thanks. >> >> Sylvia. >> > > Well it ain't Fast Fourier FuckForm. :-) >Well, I did even misspell FFS, FFS! John ;-#)#
Reply by ●November 16, 20212021-11-16
Tauno Voipio wrote:> On 16.11.21 2.51, Rick C wrote: >> On Monday, November 15, 2021 at 2:24:44 PM UTC-4, Tauno Voipio wrote: >>> On 15.11.21 15.05, Jeroen Belleman wrote: >>>> On 2021-11-15 13:52, Clive Arthur wrote: >>>>> On 15/11/2021 12:28, Rick C wrote: >>>>>> On Monday, November 15, 2021 at 7:50:25 AM UTC-4, Jeroen Belleman >>>>>> wrote: >>>>> >>>>> <snip> >>>>>>> >>>>>>> Stamp out weird units! We need a different name for the kg. >>>>>>> We shouldn't have basic units with baked-in multiplier prefixes. >>>>>> >>>>>> Isn't 'g' the basic unit??? >>>>>> >>>>> >>>>> Yes, but it's the MKS system. Would have been neater if the gram was >>>>> a thousand times bigger. >>>>> >>>>> As for the Are, that should have been 1 m^2. >>>>> >>>> >>>> In SI, the kg is the base unit. It was recently redefined to >>>> be based on some fundamental constants of nature, rather than >>>> on the mass of a lump of metal in a vault near Paris. >>>> >>>> The mks system is another thing that should be abandoned. >>>> For some weird reason, it's still popular with cosmologists. >>>> >>>> Jeroen Belleman >>> You may mix up mks and cgs systems. The old physycist system is >>> cgs. MKS evolved to SI. >> >> I have a physics text somewhere with cgs in it. The professor told us >> that Metric was replacing it though, so he would not be teaching those >> units. > > > About a half century ago, I hated Kittel's book on solid state > physics due to the use of the cgs system with the annoying electrical > units with the mess of 2 * pi and 4 * pi there and here. > > I sure hope that the units are history and stay there. >Couldn't disagree more. I do hand calculations in electromagnetics using Gaussian (rationalized cgs ESU) units. It gets rid of all the mu-noughts, epsilon-noughts, and so on. It still has the occasional four-pi, but that's in SI as well, concealed in the definition of mu-nought. In Gaussian units, magnetic field and magnetic induction have the same units (some folks quote H in oersted, but the conversion is unitless), relative and absolute mu and epsilon are the same, and there are lots fewer opportunities for blunders. Converting to circuit units at the end is trivially easy. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
