Slinky Question

On Sat, 15 May 2004 18:38:35 -0500, the renowned John Fields
<jfields@austininstruments.com> wrote:

---
Ooops...
-274.15°C = -0.990°K.
Click to expand...
You were right the first time. I think you're thinking of the
triple-point of water, which is +0.01°C or +273.16K.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
nospam <nospam@nospam.invalid> wrote in
news:lifca0haposhn178i2pf83d67gjrnpm4is@4ax.com:

maxfoo <maxfooHeadFromButt@punkass.com> wrote:

On Sat, 15 May 2004 08:17:47 GMT, B Thomas
thomasb@math.ohio-state.edu> wrote:

Hi,
Is there any utility to convert units from one to another?
sincerely
b thomas


This is my favorite one...

Convert is an easy to use unit conversion program that will convert
the most popular units of distance, temperature, volume, time, speed,
mass, power, density, pressure, energy and many others, including the
ability to create custom conversions!

http://www.joshmadison.com/software/convert/

I'm sure there are lots of others and started to write one myself.

Is there much interest in these utilities? Should I carry on?

My design is like a 2 column spread sheet with units in one column and
values in the other. Modifying a value for any unit automatically
converts and displays that value for all other units. A drop down list
at the top lets you select quantities like length, area, pressure etc.

The whole thing is configured by a user customisable .ini file with
sections like

[Temperature]
K = x, x, f
C = x - 272.15, x + 272.15, f
F = ((x - 272.15) * 9 / 5) + 32, ((x - 32) * 5 / 9) + 272.15, f


[Energy]
Joules = x, x, f
kgm = x / 9.80665, x * 9.80665, f
lbft = x * 1.355818 + 1, x / 1.355818, f
Click to expand...
Holy Cow! That's the most complicated method of F to C that I've ever
seen. Try this one. I was told about it about almost 20 yeara ago.

F + 40 / 1.8 - 40 = C
C + 40 X 1.8 - 40 = F

Perform them in the order indicated. I don't recall the "Agebraic rule"
of whether X & / are performed first or if + & - are performed first and
that rule might screw it up, as shown. I should have paid more attention
in math class.

buck
 
"buck rojerz" <inorbit@outerspace.org> wrote in message
news:Xns94EADFC309243ou812@216.168.3.44...
: nospam <nospam@nospam.invalid> wrote in
: news:lifca0haposhn178i2pf83d67gjrnpm4is@4ax.com:
:
: > maxfoo <maxfooHeadFromButt@punkass.com> wrote:
: >
: >>On Sat, 15 May 2004 08:17:47 GMT, B Thomas
: >><thomasb@math.ohio-state.edu> wrote:
: >>
: >>>Hi,
: >>>Is there any utility to convert units from one to another?
: >>>sincerely
: >>>b thomas
: >>
: >>
: >>This is my favorite one...
: >>
: >>Convert is an easy to use unit conversion program that will
convert
: >>the most popular units of distance, temperature, volume,
time, speed,
: >>mass, power, density, pressure, energy and many others,
including the
: >>ability to create custom conversions!
: >>
: >>http://www.joshmadison.com/software/convert/
: >
: > I'm sure there are lots of others and started to write one
myself.
: >
: > Is there much interest in these utilities? Should I carry on?
: >
: > My design is like a 2 column spread sheet with units in one
column and
: > values in the other. Modifying a value for any unit
automatically
: > converts and displays that value for all other units. A drop
down list
: > at the top lets you select quantities like length, area,
pressure etc.
: >
: > The whole thing is configured by a user customisable .ini
file with
: > sections like
: >
: > [Temperature]
: > K = x, x, f
: > C = x - 272.15, x + 272.15, f
: > F = ((x - 272.15) * 9 / 5) + 32, ((x - 32) * 5 / 9) + 272.15,
f
: >
: >
: > [Energy]
: > Joules = x, x, f
: > kgm = x / 9.80665, x * 9.80665, f
: > lbft = x * 1.355818 + 1, x / 1.355818, f
: >
:
: Holy Cow! That's the most complicated method of F to C that
I've ever
: seen. Try this one. I was told about it about almost 20 yeara
ago.
:
: F + 40 / 1.8 - 40 = C
: C + 40 X 1.8 - 40 = F
:
: Perform them in the order indicated. I don't recall the
"Agebraic rule"
: of whether X & / are performed first or if + & - are performed
first and
: that rule might screw it up, as shown. I should have paid more
attention
: in math class.
:
: buck

The rule is MADS, multiply, add, divide, subtract.
This only applies to figures that are not enclosed
in brackets or parentheses.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa @ comcast DOT net
Change DOT to a dot to contact me



---
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"buck rojerz" <inorbit@outerspace.org> wrote in message
news:Xns94EADFC309243ou812@216.168.3.44...

Holy Cow! That's the most complicated method of F to C that I've ever
seen. Try this one. I was told about it about almost 20 yeara ago.

F + 40 / 1.8 - 40 = C
C + 40 X 1.8 - 40 = F

Perform them in the order indicated. I don't recall the "Agebraic rule"
of whether X & / are performed first or if + & - are performed first and
that rule might screw it up, as shown. I should have paid more attention
in math class.
Click to expand...
(F - 32) C
-------- = ---
(212 - 32) 100

Cheers!
Rich
 
"Rich Grise" <null@example.net> wrote in message
news:4EDpc.130479$G_.76119@nwrddc02.gnilink.net...
: "buck rojerz" <inorbit@outerspace.org> wrote in message
: news:Xns94EADFC309243ou812@216.168.3.44...
:
: > Holy Cow! That's the most complicated method of F to C that
I've ever
: > seen. Try this one. I was told about it about almost 20
yeara ago.
: >
: > F + 40 / 1.8 - 40 = C
: > C + 40 X 1.8 - 40 = F
: >
: > Perform them in the order indicated. I don't recall the
"Agebraic rule"
: > of whether X & / are performed first or if + & - are
performed first and
: > that rule might screw it up, as shown. I should have paid
more attention
: > in math class.
:
: (F - 32) C
: -------- = ---
: (212 - 32) 100
:
: Cheers!
: Rich

After a quick Google search, here are the correct
formulae for converting Farenheit to Celsius and
back.

Celsius = (Fahrenheit - 32) * 5/9
Fahrenheit = Celsius * 9/5 + 32

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa @ comcast DOT net
Change DOT to a dot to contact me



---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.678 / Virus Database: 440 - Release Date: 5/7/04
 
Bill Garber wrote:

The rule is MADS, multiply, add, divide, subtract.
This only applies to figures that are not enclosed
in brackets or parentheses.
Click to expand...
No it isn't!

For common arithmetic:

<M>y <D>ear <A>unt <S>ally
Multiply, Divide, Add, Subtract.

-Chuck
 
"Chuck Harris" <cfharris@erols.com> wrote in message
news:40a7654f$0$3041$61fed72c@news.rcn.com...
: Bill Garber wrote:
:
: > The rule is MADS, multiply, add, divide, subtract.
: > This only applies to figures that are not enclosed
: > in brackets or parentheses.
:
: No it isn't!
:
: For common arithmetic:
:
: <M>y <D>ear <A>unt <S>ally
: Multiply, Divide, Add, Subtract.
:
: -Chuck

Oh yeah, you're right. Sorry 'bout that.

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa @ comcast DOT net
Change DOT to a dot to contact me



---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.678 / Virus Database: 440 - Release Date: 5/6/04
 
On Sun, 16 May 2004 00:29:04 GMT, Philip A. Marshall
<philmarshall@hotmail.com> wrote:


I agree. How much more sensible it would be to be on a 66 watt diet
instead of, what is that anyway, about 2000 Calories?

...which is, in reality, 2000 KCal ;)
Click to expand...
---
Yes, that's why I spelled it Calories instead of calories, but it's
not 66 watts.

Since 1 calorie = 4.186 joules, 2000 calories would be equal to 8372
joules, and 2000 kilocalories would be equal to 8,372,000 joules.

Since 1 joule per second is one watt and there are 86,400 seconds in a
day, 8372000 joules/86400 seconds ~ 96.9 watts.

So, if we're consuming 2000 Calories a day, that's about 100 watts.

--
John Fields
 
On Sun, 16 May 2004 00:47:43 GMT, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Sat, 15 May 2004 18:38:35 -0500, the renowned John Fields
jfields@austininstruments.com> wrote:

---
Ooops...
-274.15°C = -0.990°K.

You were right the first time. I think you're thinking of the
triple-point of water, which is +0.01°C or +273.16K.
Click to expand...
---
OK

--
John Fields
 
On Sun, 16 May 2004 06:13:20 GMT, "Rich Grise" <null@example.net>
wrote:

"buck rojerz" <inorbit@outerspace.org> wrote in message
news:Xns94EADFC309243ou812@216.168.3.44...

Holy Cow! That's the most complicated method of F to C that I've ever
seen. Try this one. I was told about it about almost 20 yeara ago.

F + 40 / 1.8 - 40 = C
C + 40 X 1.8 - 40 = F

Perform them in the order indicated. I don't recall the "Agebraic rule"
of whether X & / are performed first or if + & - are performed first and
that rule might screw it up, as shown. I should have paid more attention
in math class.

(F - 32) C
-------- = ---
(212 - 32) 100
Click to expand...
---
????

F = 1.8C + 32
C = 1.8 (F-32)

Simple...



--
John Fields
 
On Sun, 16 May 2004 08:50:17 -0500, the renowned John Fields
<jfields@austininstruments.com> wrote:

On Sun, 16 May 2004 06:13:20 GMT, "Rich Grise" <null@example.net
wrote:

"buck rojerz" <inorbit@outerspace.org> wrote in message
news:Xns94EADFC309243ou812@216.168.3.44...

Holy Cow! That's the most complicated method of F to C that I've ever
seen. Try this one. I was told about it about almost 20 yeara ago.

F + 40 / 1.8 - 40 = C
C + 40 X 1.8 - 40 = F

Perform them in the order indicated. I don't recall the "Agebraic rule"
of whether X & / are performed first or if + & - are performed first and
that rule might screw it up, as shown. I should have paid more attention
in math class.

(F - 32) C
-------- = ---
(212 - 32) 100

---
????

F = 1.8C + 32
C = 1.8 (F-32)

Simple...
Click to expand...
The second one seems a bit inaccurate at any temperature other than
0°C.

One thing that seems to screw up some people is when you have to
convert differential temperatures (such as proportional band,
hysteresis or whatever) they sometimes don't think and use formulas as
so:

deadband = 5°C, so it should display as (5 * 1.8) + 32 = 41°F
rather than the correct number (9°F).

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
Spehro Pefhany wrote:

(F - 32) C
-------- = ---
(212 - 32) 100

---
????

F = 1.8C + 32
C = 1.8 (F-32)

Simple...


The second one seems a bit inaccurate at any temperature other than
0°C.
Click to expand...
Come on guys, this isn't that tough:

F = (9/5)C + 32
C = (5/9)(F-32)

or,

F = 1.8C + 32
C = (F-32)/1.8

Then for additional fun, what temperature is
the same for both farenheit and celsius?

F = 1.8C + 32, let F = C, so:

F = 1.8F + 32

F - 1.8F = 32

-0.8F = 32

F = -32/0.8

F = -40

-Chuck
 
On Sun, 16 May 2004 14:36:26 GMT, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

On Sun, 16 May 2004 08:50:17 -0500, the renowned John Fields
jfields@austininstruments.com> wrote:

---
????

F = 1.8C + 32
C = 1.8 (F-32)

Simple...

The second one seems a bit inaccurate at any temperature other than
0°C.
Click to expand...
---
Aaarghhh!!!

1.8C + 32 = F

1.8C = F - 32

C = (F-32)/1.8

Howzat?

--
John Fields
 
On Sun, 16 May 2004 11:33:46 -0400, the renowned Chuck Harris
<cfharris@erols.com> wrote:

Spehro Pefhany wrote:


(F - 32) C
-------- = ---
(212 - 32) 100

---
????

F = 1.8C + 32
C = 1.8 (F-32)

Simple...


The second one seems a bit inaccurate at any temperature other than
0°C.

Come on guys, this isn't that tough:

F = (9/5)C + 32
C = (5/9)(F-32)

or,

F = 1.8C + 32
C = (F-32)/1.8

Then for additional fun, what temperature is
the same for both farenheit and celsius?

F = 1.8C + 32, let F = C, so:

F = 1.8F + 32

F - 1.8F = 32

-0.8F = 32

F = -32/0.8

F = -40
Click to expand...
That's "Fahrenheit", as in the German-Dutch scientist Gabriel Daniel
Fahrenheit.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
 
"maxfoo" <maxfooHeadFromButt@punkass.com> wrote in message
news:u17ca01q5r19uik13as30o30nnetj0t453@4ax.com...
On Sat, 15 May 2004 08:17:47 GMT, B Thomas
thomasb@math.ohio-state.edu> wrote:

Hi,
Is there any utility to convert units from one to another?
sincerely
b thomas


This is my favorite one...

Convert is an easy to use unit conversion program that will convert
the most
popular units of distance, temperature, volume, time, speed, mass,
power,
density, pressure, energy and many others, including the ability to
create
custom conversions!

http://www.joshmadison.com/software/convert/
Click to expand...

Even furlongs per fortnight, and attoparsecs?? ;-)


Really, there must be humdreds of these in any web search.

--
@@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@
###Got a Question about ELECTRONICS? Check HERE First:###
http://users.pandora.be/educypedia/electronics/databank.htm
My email address is whitelisted. *All* email sent to it
goes directly to the trash unless you add NOSPAM in the
Subject: line with other stuff. alondra101 <at> hotmail.com
Don't be ripped off by the big book dealers. Go to the URL
that will give you a choice and save you money(up to half).
http://www.everybookstore.com You'll be glad you did!
Just when you thought you had all this figured out, the gov't
changed it: http://physics.nist.gov/cuu/Units/binary.html
@@t@h@e@@a@f@f@l@u@e@n@t@@m@e@e@t@@t@h@e@@E@f@f@l@u@e@n@t@@
 
"John Fields" <jfields@austininstruments.com> wrote in message
news:86sea093lb2o5m7i5g6fethud7jisjjqp7@4ax.com...
On Sun, 16 May 2004 06:13:20 GMT, "Rich Grise" <null@example.net

(F - 32) C
-------- = ---
(212 - 32) 100

---
????
Click to expand...
It's from how the conversion was derived. THe freezing point is
32 F == 0 C, the boiling point is 212 F == 100 C. Therefore
the interval from freezing to boiling is 180 fahrenheit degrees,
== 100 celsius degrees. Subtract the 32 degree offset from F,
and it's 180:100.

(F - 32) C
-------- = ---
(212 - 32) 100

212 - 32 = 180

(F - 32) C
-------- = ---
180 100

100 * (F - 32) = C * 180

and so on.

Cheers!
Rich
 
Spehro Pefhany wrote:

The second one seems a bit inaccurate at any temperature other than
0°C.

Come on guys, this isn't that tough:

F = (9/5)C + 32
C = (5/9)(F-32)

or,

F = 1.8C + 32
C = (F-32)/1.8

Then for additional fun, what temperature is
the same for both farenheit and celsius?

F = 1.8C + 32, let F = C, so:

F = 1.8F + 32

F - 1.8F = 32

-0.8F = 32

F = -32/0.8

F = -40


That's "Fahrenheit", as in the German-Dutch scientist Gabriel Daniel
Fahrenheit.
Click to expand...
I'll try and remember that. I usually spell Fahrenheit "F".

-Chuck
 
buck rojerz wrote:
nospam <nospam@nospam.invalid> wrote in
news:lifca0haposhn178i2pf83d67gjrnpm4is@4ax.com:

maxfoo <maxfooHeadFromButt@punkass.com> wrote:

On Sat, 15 May 2004 08:17:47 GMT, B Thomas
thomasb@math.ohio-state.edu> wrote:

Hi,
Is there any utility to convert units from one to another?
sincerely
b thomas


This is my favorite one...

Convert is an easy to use unit conversion program that will convert
the most popular units of distance, temperature, volume, time, speed,
mass, power, density, pressure, energy and many others, including the
ability to create custom conversions!

http://www.joshmadison.com/software/convert/

I'm sure there are lots of others and started to write one myself.

Is there much interest in these utilities? Should I carry on?

My design is like a 2 column spread sheet with units in one column and
values in the other. Modifying a value for any unit automatically
converts and displays that value for all other units. A drop down list
at the top lets you select quantities like length, area, pressure etc.

The whole thing is configured by a user customisable .ini file with
sections like

[Temperature]
K = x, x, f
C = x - 272.15, x + 272.15, f
F = ((x - 272.15) * 9 / 5) + 32, ((x - 32) * 5 / 9) + 272.15, f


[Energy]
Joules = x, x, f
kgm = x / 9.80665, x * 9.80665, f
lbft = x * 1.355818 + 1, x / 1.355818, f


Holy Cow! That's the most complicated method of F to C that I've ever
seen. Try this one. I was told about it about almost 20 yeara ago.

F + 40 / 1.8 - 40 = C
C + 40 X 1.8 - 40 = F

Perform them in the order indicated. I don't recall the "Agebraic rule"
of whether X & / are performed first or if + & - are performed first and
that rule might screw it up, as shown. I should have paid more attention
in math class.

buck
----------------------
Click to expand...
Uh, those are silly, and wrong.

40 * 1.8 = 40 + 32, so C + 40 * 1.8 -40 = C + (40 + 32 - 40),
which is stupid.

Just use F = C * 9/5 + 32 and C = (F -32) * 5/9

And by the way, parens first then mult/div, then add/sub.

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
 
"Bill Garber" <willy46pa@comcast DOT net> wrote in
news:b6qdnd8ghol7njrdRVn-sA@comcast.com:

"buck rojerz" <inorbit@outerspace.org> wrote in message
news:Xns94EADFC309243ou812@216.168.3.44...
: nospam <nospam@nospam.invalid> wrote in
:
:
: Holy Cow! That's the most complicated method of F to C that
I've ever
: seen. Try this one. I was told about it about almost 20 yeara
ago.
:
: F + 40 / 1.8 - 40 = C
: C + 40 X 1.8 - 40 = F
:
: Perform them in the order indicated. I don't recall the
"Agebraic rule"
: of whether X & / are performed first or if + & - are performed
first and
: that rule might screw it up, as shown. I should have paid more
attention
: in math class.
:
: buck

The rule is MADS, multiply, add, divide, subtract.
This only applies to figures that are not enclosed
in brackets or parentheses.
Click to expand...
Thanks much, Bill. After posting this I ran it through my sci.
calculator and it failed(no surprise) as it is written, because of
"MADS", no doubt. I appreciate your help.
Thanks again

buck


Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa @ comcast DOT net
Change DOT to a dot to contact me



---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.678 / Virus Database: 440 - Release Date: 5/7/04
Click to expand...
 
Chuck Harris <cfharris@erols.com> wrote in news:40a7654f$0$3041
$61fed72c@news.rcn.com:

Bill Garber wrote:

The rule is MADS, multiply, add, divide, subtract.
This only applies to figures that are not enclosed
in brackets or parentheses.

No it isn't!

For common arithmetic:

M>y <D>ear <A>unt <S>ally
Multiply, Divide, Add, Subtract.

-Chuck
Click to expand...
Ok... Thanks to you as well, Chuck.

buck
 
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