v for frequency?...

[The Natural Philosopher]

On 15/03/2023 15:06, NY wrote:

On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency?  v is velocity, f is
frequency, lambda is wavelength.  Using v for frequency is pure insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency

Are you thinking of lamba λ (like an inverted v with a tail on one leg)
which is wavelength (c/f) where c is speed of light and f is frequency.

\"On our constants and equations sheet, the italicized v stands for the
greek letter nu, which is the variable for frequency. The regular v
stands for velocity. On that sheet specifically, c = λ v and E = hv are
the only equations that use the greek letter nu (frequency). Hope this
helps!\"

https://lavelle.chem.ucla.edu/forum/viewtopic.php?t=65469

--
In theory, there is no difference between theory and practice.
In practice, there is.
-- Yogi Berra

 

[Brian Gaff]

This makes my brain Hertz.

Brian

--

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\"NY\" <me@privacy.net> wrote in message
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On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency? v is velocity, f is
frequency, lambda is wavelength. Using v for frequency is pure insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency

Are you thinking of lamba ? (like an inverted v with a tail on one leg)
which is wavelength (c/f) where c is speed of light and f is frequency.

 

[Peeler]

On Wed, 15 Mar 2023 15:06:07 +0000, NY, the really endlessly blathering,
notorious, troll-feeding, senile asshole, blathered, yet again:


> Are you thinking

He\'s TROLLING, you brain dead troll-feeding senile ASSHOLE!

 

[Ralph Mowery]

In article <tusuvq$vpf7$1@dont-email.me>, brian1gaff@gmail.com says...

This makes my brain Hertz.

Mine too. I still say cycles more than Hertz. Just as I often say 110
instead of 120 which is more like 125 volts now. Guess we need to
rename or put a name on standard line voltages. Just call them Angie,
bill, Carol for the 120, 240, 480 volts !!!

 

[%%]

On Wed, 15 Mar 2023 22:27:54 +1100, Carlos E.R. <robin_listas@es.invalid>
wrote:

On 2023-03-13 21:15, jim.gm4dhj wrote:
On 13/03/2023 20:00, Peeler wrote:
On Mon, 13 Mar 2023 19:24:58 +0000, dim.gm4dhj, the brain dead,
troll-feeding, senile idiot, blathered again:


https://en.wikipedia.org/wiki/Frequency
stuff that I object to Hz rather tan c/s

So why don\'t you start a new thread about it, you idiotic troll-feeding
senile asshole?
piss off

Please, just learn to filter him out automatically, in your Thunderbird,
and never answer to him. You are just making it worse sending these
useless messages to everybody in the world, and he is enjoying it.

He is one of those who goes out of his way to do what
anyone asks him not to do.

 

[Peeler]

On Thu, 16 Mar 2023 06:37:03 +1100, %%, better known as cantankerous
trolling senile geezer Rodent Speed, wrote:

<FLUSH the abnormal trolling senile cretin\'s latest trollshit unread>

--
Richard addressing senile Rodent Speed:
\"Shit you\'re thick/pathetic excuse for a troll.\"
MID: <ogoa38$pul$1@news.mixmin.net>

 

[server]

On Wed, 15 Mar 2023 15:28:27 +0000, NY <me@privacy.net> wrote:

I can see an advantage in abbreviating \"c/s\" to \"Hz\", especially when it
is spoken aloud - \"482 mega hertz\" is shorter than \"482 mega cycles per
second\".

Are there any other SI units which are abbreviations for the reciprocal
of another SI unit? I suppose there\'s mho for conductance which is 1/R
(in ohms) and written as an upside-down omega. But that\'s not as widely
used.

For conductance (1/R), suspectance and admittance (1/Z) the unit is
Siemens (S).

 

[NY]

On 15/03/2023 22:08, upsidedown@downunder.com wrote:

On Wed, 15 Mar 2023 15:28:27 +0000, NY <me@privacy.net> wrote:


I can see an advantage in abbreviating \"c/s\" to \"Hz\", especially when it
is spoken aloud - \"482 mega hertz\" is shorter than \"482 mega cycles per
second\".

Are there any other SI units which are abbreviations for the reciprocal
of another SI unit? I suppose there\'s mho for conductance which is 1/R
(in ohms) and written as an upside-down omega. But that\'s not as widely
used.

For conductance (1/R), suspectance and admittance (1/Z) the unit is
Siemens (S).

Ah yes, I\'d forgotten that siemens is the new name for the unit that
used to be called mho.

 

[Commander Kinsey]

On Wed, 15 Mar 2023 15:45:19 -0000, The Natural Philosopher <tnp@invalid..invalid> wrote:

On 15/03/2023 15:06, NY wrote:
On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency? v is velocity, f is
frequency, lambda is wavelength. Using v for frequency is pure insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency

Are you thinking of lamba λ (like an inverted v with a tail on one leg)
which is wavelength (c/f) where c is speed of light and f is frequency.

\"On our constants and equations sheet, the italicized v stands for the
greek letter nu, which is the variable for frequency. The regular v
stands for velocity. On that sheet specifically, c = λ v and E = hv are
the only equations that use the greek letter nu (frequency). Hope this
helps!\"

https://lavelle.chem.ucla.edu/forum/viewtopic.php?t=65469

I just use f.

 

[Commander Kinsey]

On Wed, 15 Mar 2023 19:10:53 -0000, Ralph Mowery <rmowery42@charter.net> wrote:

In article <tusuvq$vpf7$1@dont-email.me>, brian1gaff@gmail.com says...

This makes my brain Hertz.

Mine too. I still say cycles more than Hertz.

That\'s because you\'re a Merkin and can\'t name anything correctly. I bet you say counter clockwise!

Just as I often say 110
instead of 120 which is more like 125 volts now.

Pitiful. Standard 240V all over my house, just the one voltage, just the one style of socket, 13 amps at every socket. Over 3kW for any device you can plug in anywhere. I don\'t need a special circuit for a dryer.

Guess we need to
rename or put a name on standard line voltages. Just call them Angie,
bill, Carol for the 120, 240, 480 volts !!!

That sounds like what Apple do. Is Leopard or Tiger the newer version of the OS? Who knows?

 

[rbowman]

On Sun, 19 Mar 2023 12:20:32 -0000, Commander Kinsey wrote:

That sounds like what Apple do. Is Leopard or Tiger the newer version
of the OS? Who knows?

The Leopard is newer that the Tiger. Oh, you\'re talking about OSs, not
Panzers.

 

[Peeler]

On 19 Mar 2023 18:26:56 GMT, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:

The Leopard is newer that the Tiger. Oh, you\'re talking about OSs, not
Panzers.

Oh, you are talking simply because you love so much to hear yourself
talking, senile bigmouth!

--
Yet more of the very interesting senile blather by lowbrowwoman:
\"I save my fries quota for one of the local food trucks that offers
poutine every now and then. If you\'re going for a coronary might as well
do it right.\"
MID: <ivdi4gF8btlU1@mid.individual.net>

 

[NY]

\"Commander Kinsey\" <CK1@nospam.com> wrote in message
newsp.111y5a1tmvhs6z@ryzen.home...

On Wed, 15 Mar 2023 15:45:19 -0000, The Natural Philosopher
tnp@invalid.invalid> wrote:

On 15/03/2023 15:06, NY wrote:
On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency? v is velocity, f is
frequency, lambda is wavelength. Using v for frequency is pure
insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency

Are you thinking of lamba λ (like an inverted v with a tail on one leg)
which is wavelength (c/f) where c is speed of light and f is frequency.

\"On our constants and equations sheet, the italicized v stands for the
greek letter nu, which is the variable for frequency. The regular v
stands for velocity. On that sheet specifically, c = λ v and E = hv are
the only equations that use the greek letter nu (frequency). Hope this
helps!\"

https://lavelle.chem.ucla.edu/forum/viewtopic.php?t=65469

I just use f.

I\'ve never heard of nu (italic v) being used for frequency in all my
O-level, A-level and university electronic engineering studies. Only f or
omega, where omega = 2 pi f

omega is called angular frequency.


And, being an elec eng, I use j (rather than i) to denote sqrt(-1), since i
tends to be used to denote instantaneous current. I once worked with a guy
called Bill Taylor whose initials were J W T (James William Taylor). He was
known as \"J-Omega\".

 

[Peeler]

On Mon, 20 Mar 2023 13:32:06 -0000, NY, the really endlessly blathering,
notorious, troll-feeding, senile asshole, blathered, yet again:


> I\'ve never heard of

Ever heard of \"don\'t feed the troll\", you idiotic senile bullshit artist?

 

[Fredxx]

On 20/03/2023 13:32, NY wrote:

\"Commander Kinsey\" <CK1@nospam.com> wrote in message
newsp.111y5a1tmvhs6z@ryzen.home...
On Wed, 15 Mar 2023 15:45:19 -0000, The Natural Philosopher
tnp@invalid.invalid> wrote:

On 15/03/2023 15:06, NY wrote:
On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency?  v is velocity, f is
frequency, lambda is wavelength.  Using v for frequency is pure
insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency

Are you thinking of lamba λ (like an inverted v with a tail on one leg)
which is wavelength (c/f) where c is speed of light and f is frequency.

\"On our constants and equations sheet, the italicized v stands for the
greek letter nu, which is the variable for frequency. The regular v
stands for velocity. On that sheet specifically, c = λ v and E = hv are
the only equations that use the greek letter nu (frequency). Hope this
helps!\"

https://lavelle.chem.ucla.edu/forum/viewtopic.php?t=65469

I just use f.


I\'ve never heard of nu (italic v) being used for frequency in all my
O-level, A-level and university electronic engineering studies. Only f
or omega, where omega = 2 pi f

It\'s generally used for light and frequencies higher than you might
design for:
https://www.sciencedirect.com/topics/engineering/plancks-constant

> omega is called angular frequency.

Yes.

And, being an elec eng, I use j (rather than i) to denote sqrt(-1),
since i tends to be used to denote instantaneous current. I once worked
with a guy called Bill Taylor whose initials were J W T (James William
Taylor). He was known as \"J-Omega\".

The maths element of degrees in the UK have generally been taught by
mathematicians who would use \'i\'. Most would be then be familiar with
the duality of symbols.

 

[soup]

On 15/03/2023 15:28, NY wrote:

I once worked with a guy who used the trendy pronunciation for lengths
of running races or distances along roads, and the scientific
pronunciation for units in scientific/engineering contexts.

I use something similar I use Imperial units (Miles, Feet etc) for
distances along roads peoples sizes etc, but Metric ( Centimetres
Millimetres etc) for scientific/engineering contexts .

 

[SH]

On 20/03/2023 14:19, soup wrote:

On 15/03/2023 15:28, NY wrote:

I once worked with a guy who used the trendy pronunciation for lengths
of running races or distances along roads, and the scientific
pronunciation for units in scientific/engineering contexts.

I use something similar I use Imperial units (Miles, Feet etc) for
distances along roads peoples sizes etc, but Metric ( Centimetres
Millimetres etc) for scientific/engineering contexts .

What are Imperial units????

I was brought up in the MKS and CGS system....

 

[The Natural Philosopher]

On 20/03/2023 13:32, NY wrote:

I\'ve never heard of nu (italic v) being used for frequency in all my
O-level, A-level and university electronic engineering studies. Only f
or omega, where omega = 2 pi f

omega is called angular frequency.

v is used in Physics, not electronics. E=hv being the one I can
remember. It may be relating the energy in photon to its spectral frequency

--
\"Corbyn talks about equality, justice, opportunity, health care, peace,
community, compassion, investment, security, housing....\"
\"What kind of person is not interested in those things?\"

\"Jeremy Corbyn?\"

 

[SH]

On 20/03/2023 19:33, The Natural Philosopher wrote:

On 20/03/2023 13:32, NY wrote:
I\'ve never heard of nu (italic v) being used for frequency in all my
O-level, A-level and university electronic engineering studies. Only f
or omega, where omega = 2 pi f

omega is called angular frequency.
 v is used in Physics, not electronics. E=hv being the one I can
remember. It may be relating the energy in photon to its spectral frequency

and I remember E = hc / Lambda

so c = lambda x v

where m is the speed of light in ms^-1, Lambda is wavelength in metres
and v is the frequency in Hz or s^-1

 

[Commander Kinsey]

On Wed, 15 Mar 2023 15:28:27 -0000, NY <me@privacy.net> wrote:

On 13/03/2023 19:24, jim.gm4dhj wrote:
On 13/03/2023 13:08, Commander Kinsey wrote:
Since when did we start using v for frequency? v is velocity, f is
frequency, lambda is wavelength. Using v for frequency is pure insanity.

https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Physical_Chemistry_(LibreTexts)/13%3A_Molecular_Spectroscopy/13.01%3A_The_Electromagnetic_Spectrum
https://en.wikipedia.org/wiki/Frequency
stuff that I object to Hz rather tan c/s

(I assume \"tan\" is a typo for \"than\", rather than the trig function!)

I can see an advantage in abbreviating \"c/s\" to \"Hz\", especially when it
is spoken aloud - \"482 mega hertz\" is shorter than \"482 mega cycles per
second\".

Are there any other SI units which are abbreviations for the reciprocal
of another SI unit?

I wasn\'t aware cycles was an SI unit. When would you ever state \"79 cycles\"? It\'s not something you count like joules or metres.

I suppose there\'s mho for conductance which is 1/R
(in ohms) and written as an upside-down omega. But that\'s not as widely
used.

Gotta like spelling ohm backwards to get mho!

The notation that always jars with me is the use of negative powers in
place of \"per\". My Nuffield Physics O/A level books always referred to
speeds in m.s^-1 and accelerations in m.s^-2 (where \"^-1\" denotes a
superscript \"-1\" etc. The teacher was undecided as to how you pronounced
that: was it \"metres seconds-to-the-minus-1\" or \"metres per second\"?

Negative superscript units always seemed to be a gimmick too far.

If I say 4 x 10^1, that means multiplying the 4 by the 10. So if I say 4 x 10^-1, it\'s the same as taking the 4 and dividing it by 10. So I guess it makes sense. Simpler to say 4/10 though.

I think I\'ve seen m.s^-1 and m/s equally. Although I\'ve never known the dot between m and s.

And then we get onto the thorny issue of \"traditional\" versus IUPAC
names for chemical compounds - acetic versus ethanoic acid, isopropyl
alcohol versus propan-2-ol: the traditional names are more familiar but
the IUPAC names are more systematic and more accurately represent how
the atoms are arranged. Familiar versus Sunday-school names ;-)

I prefer the new ones, they\'re more logical, although if I was old enough to have learned the old ones, I probably would end up still hanging onto them. Just like I grew up with F, but started using C around the 0 mark, as it was easier for 0 to be freezing point. So I\'d say it\'s 70 degrees in the living room, but minus 4 outside, using F for inside and C for outside. I now use C everywhere. Rooms got a bit cooler, since I used to say 70 was room temperature, now I say 20. SI units save power!

> But the ultimate \"grates like chalk on a blackboard\"

It doesn\'t, fingernails do. I had a teacher who would do that to stop us chatting. I had another who brought a huge wooden set square down on a desk with great force. Although one day it split in half and one half flew across the room, missed the heads of a few kids who ducked, and cracked the window. Instead of the usual \"I like to make noise too!\" he said \"oh dear\".

usage for me is
kilometre pronounced \"kill-OMM-i-TAH\" when all other SI prefixes and
units have the stress on the first syllable \"KILL-o-ME-tre\" (as for
\"MIcroMEtre\", \"MEGaMEtre\" etc). It\'s hilarious to hear Prof Brian Cox
flipping between \"kill-OMM-i-TAH\" which his director has probably told
him is the trendy pronunciation and \"KILL-o-ME-tre\" which he always used
in scientific and engineering work - sometimes he does it from one
sentence to the next.

I use either and it doesn\'t bother me, but OMM-itah to me is more of a thing designed to measure, as in a micROMeter measure MICrometres.

So since a miLOMMeter measures how many miles your car has travelled, surely modern cars should have a kilOMMitarOMMitar?

I once worked with a guy who used the trendy pronunciation for lengths
of running races or distances along roads, and the scientific
pronunciation for units in scientific/engineering contexts.

The only distance I remember was my PE teacher shouting at me \"round the perimeter!\" - a punishment for disobedience. Since he was a bit queer, we used to call it \"round the perimeter with your pants down!\" This was before peadophilophobia - one of my friends fucked a French teacher in the swimming pool. Nothing was said.