I had this is school but it wasn't my best subject. Can someone please refresh me on how to convert temperatures......celsius to fahrenheit.(and how to spell farhenheit.please?)
(Celcius temperature times 9) divided by 5 Then that amount +32
10Cx9=90/5=18+32=50F
The opposite of your question is:
(Fahrenheit temperature minus 32) times 5 Then that amount divided by 9
50F-32=18x5=90/9=10C
or with decimals: 10C times 1.8=18+32=50F
50F-32=18 divided by 1.8=10C.
The reason it works is that every degree Fahrenheit is worth almost double (1.8 or 9/5) the value of one degree Celcius. Then you just have to get freezing from 32F to 0C or vice versa.
A traveler's cheat approximation for C to F is degrees C times 2 + 30 (10x2=20+30=50 but it can be off a little).
I also like to approximate based on 0C=32F, 10C=50F, 20C=68F, 30C=86F and every 5 degrees Celcius is 9 degrees Fahrenheit. ******** 07-08-02, 05:11 PM psych major thanks for the help big grin ******** 07-08-02, 06:05 PM DrGerard If C is the temperature in degrees Celsius and F is the temperature in degrees Fahrenheit, then the following exact relation holds:
F + 40 = 1.8 ( C + 40 )
This gives you immediately the correct answer to the popular trivia question: "What temperature is the same in both scales (Fahrenheit and Celsius)?" Answer: "-40" (or "40 below").
More importantly, this gives you a quick way to do the accurate conversions mentally without complicated computations, because:
* To multiply by 1.8 (from C to F), you multiply by 2 (easy) and subtract 10% from the result (almost as easy and perfectly accurate). * To divide by 1.8 (from F to C), you divide by 2 and add 10% to the result. (Well, 11% is more accurate in this case, since the exact percentage is 11.11111...%)
For example, to convert 20°C you double 20+40 which gives you 120, subtract 12 (10%) to obtain 108 and finally subtract 40 to obtain 68°F. The result is exact and not much more difficult to obtain than the dubious approximations given by other "simplified" formulas... roll eyes ******** 07-10-02, 05:02 PM DrGerard
´ 1 . 8 = ¸ 1 . 8 = With a simple calculator, exact conversions are performed either way in only 5 keystrokes, since it's easy to account for the simple 40° translation (the same in both scales) as you enter or read the data.
See www.numericana.com/answer/formula.htm#temperature. ******** 07-11-02, 09:44 AM Matiqua The way that I and my family convert is if we convert Celsius to Fahrenheit is that we double the C temp. than add 30. Most of the time it gives a very good answer, it's simple and it's nearly always accurate. ******** 05-01-06, 12:55 PM DJ Example.
What is the temperture of f = 20.
F = (9/5 X C)+ 32
Flip 9/5 to 5/9 and divide 5 to 9 which gives you 1.8. Do 1.8 x 20 = 36. Then do 36+32 which gives you 68. That's how you do um! ******** 06-27-06, 09:10 AM hassia i can help with a few weather temperatures: 32F = 0C, 50F = 10C, 61F = 16C, 82F = 28C, 95F = 35C ******** 06-28-06, 11:23 PM gerry Trivia question: Prior to 1948, Celsius was known as _____________??
Did you also know that the USA made a feeble attempt in the late '1950's/early 1960's to convert the USA to the SI/metric system (Celsius, meters, kilograms, etc.), and that it made some very very slow progress in doing so, but now some 45 years later, metric is all but dead here? Even the Feds, who had converted much of their data to metric, have all but given up on their own directive, and are going back to the the old USA 'imperial' units of measure. We don't take change too easily. ******** 06-28-06, 11:32 PM DorianGreyed As I recall, it was in the late 60s, and even more in the 70s that the US tried to change. Some gas stations had both gallons and liters showing, and at least one baseball stadium ( Cincinnati?) had its fences marked in meters. I don't remember much of an effort before then, but I admit to the possibility of being wrong in error. ******** 06-29-06, 02:34 AM FredPuli Celsius? Don't you mean 'centigrade'? Big Grin Our Met Office has given temperatures in 'Celsius' for many years. Originally they too called it 'centigrade'. Their mistake was in persisting in giving the Fahrenheit figure as well.It would have been better had they used Celsius from the outset. They have gradually taken to saying Celsius first and progressively phase out the Fahrenheit figure. That's now given as an apologetic afterthought, if given at all.
British children have been taught only in metric units for at least 40 years. So a Briton ('Brit' as you mysteriously say: but then you seem to think that our policemen are 'bobbies', so perhaps we should give up our bemusement !)would need to be well into middle age or beyond not to understand . ******** 06-29-06, 07:13 AM methos
quote: 'Brit' as you mysteriously say
And the problem is? I'll stop when I no longer hear "Yanks" used as it is Wink. ******** 06-29-06, 11:37 AM FredPuli
quote: Originally posted by methos:
quote: 'Brit' as you mysteriously say
And the problem is? I'll stop when I no longer hear "Yanks" used as it is Wink.
I don't think I've heard 'Yanks' for 'Americans' in thirty years or more. You'd hear it in WW2 British war films and perhaps you might find some very old soldiers use it. Perhaps I'm missing something but isn't there a patriotically themed song called 'Over There' with a line 'The Yanks are coming, the Yanks are coming' ?
What does " as it is" in your post mean? Confused ******** 06-29-06, 12:56 PM methos "I don't think I've heard 'Yanks' for 'Americans' in thirty years or more."
Cotton in the ears? (kidding) I'm not yet 30 and I've heard it plenty of times in my life (heck, I've read it a handful of times on these boards and seen it in British newspapers fairly recently).
I don't really have a point, and I certainly don't take offense at being called a Yank. I was just wondering what the point of the "Brit" comment was.
The "as it is" was just a comment on the difference in usage. In my experience, Americans tend to use it to mean "Americans" only when talking to or about "Brits," and usually when trying to be self-effacing. Southerners do seem to use the term more frequently, but to refer to Northerners, not themselves.
I have no point and didn't mean to push this thread off-topic. ******* 06-29-06, 03:29 PM FredPuli
quote: Originally posted by methos: "I don't think I've heard 'Yanks' for 'Americans' in thirty years or more."
I was just wondering what the point of the "Brit" comment was.
Because nobody in Britain ever uses or used the word 'Brit'. It is entirely an American invention. Americans evidently do, or did, use the word 'Yank'. When we use the word 'Yank' it is in the context of a reference, humorous or otherwise, to how Americans were once referred to in e.g WW2. The word may be used of modern Americans but it has something of a derogatory overtone and is meant as an allusion to the past, not usually friendly at that.For this reason I for one would never use it . ******** 06-29-06, 04:44 PM methos Nobody is a bit strong, but I'll take your word that "Brit" isn't common in Britian, newspapers and young actresses aside. I'm not sure origins matter much, though. Yankee was a Dutch invention taken on by the British, both of whom meant it to be derogatory.
I was really just giving you a hard time. Wink ******** 06-29-06, 10:58 PM Professor People still commonly refer to "centrigrade" temperatures even though the scale's name was officially changed to Celsius in 1948 (that answers Gerry's question above).
quote: In 1795, 53 years after Anders Celsius proposed a Centigrade temperature scale, the prefix centi- began to be used in the metric system to mean “1/100,” as in centimeter, centigram, and centiliter. Later, in the 1850s, with the widespread introduction of the metric system, Centigrade started to cause confusion. This is because many European languages have a word similar to grade as their word for degree. For example, German has Grad, Swedish has ]i]grad]/i], and Spanish and Italian have grado. Thus, scientific communications developed an ambiguity. When speaking of a Centigrade, did one mean the temperature scale or 1/100 of some degree measure? In order to remove this confusion, scientists agreed in 1948 that the temperature unit degree Centigrade would henceforth be called degree Celsius and the symbol would be °C. ******** 06-29-06, 11:02 PM FredPuli Methos you are missing the nuance in the examples you give , that of British irony and humour: the expression 'plucky Brits' is taken from what Americans said of us, as a compliment, in WW2 but was soon adopted by us as a colloquialism for 'gallant loser' It is used ironically of any British 'nearly man ', Henman being a fine example of a 'plucky Brit'. A 'real Brit' and a 'true Brit' are variations on this theme Smile
Keira Knightley, a 'Brit', is also having a sly in-joke,along the same lines, of using the American word like an American film star talking , a point taken up by the writer of the piece.She is a rare 'Brit' in an American industry. We certainly do use Brit in such a way as that Wink An extension of this is calling what were the UK record industry's Britannia Awards in pop music the Brit Awards (which is now their official title),an abbreviation but also a sly, jokey, reference to American domination of pop music: any British artist who made it in America was 'a Brit'. The joke was made pointed by the fact that commonly many or most of the winners of these British industry Awards were American so among them were some 'Brits' Big Grin.
No doubt there are many other examples to be found of this self-conscious usage.
(We do miss maiku sometimes Wink ) ******** 06-29-06, 11:21 PM gerry
quote: Originally posted by FredPuli: ...British children have been taught only in metric units for at least 40 years.
How unfortunate Frown. When these kids are old enough to drive, how will they understand the speed limit signs on the highways, which, as I understand it, are still to this day posted in 'miles per hour'? Confused And again off topic, how do you say 'kids' in 'Brit' Winktalk? ******** 06-29-06, 11:49 PM FredPuli converting C to F Gerry, we call them 'kids' in British Smile They don't get confused by miles per hour because 'miles' is what they are used to seeing. Every road sign giving distances between towns etc is in miles as are the speed limit signs. The speedometer on a British car has both kph and mph but the mph figures are much larger.Learner drivers see and use only miles and mph therefore.Asked how far away a town is by road, people will say the answer in miles because that is conventional and relates to maps and signs.
The main argument against changing to kilometres has been the cost of changing the signs but it is also argued that there could be a risk of driver error in misreading speed limit signs.
To an extent our children still have dual measurement. Most British children have some idea what 'a stone' is because older people still talk of dieting and 'losing a stone'(14lbs) or of someone being 'only 8 stone' (112 lbs) and so on. The French, metric since the C18, still use the pound colloquially, in the sense that they may ask for 'une livre' of something and expect to get half a kilo, and even the 'hand' to measure a horse, though they call it the 'paume' (palm). Some customs or idioms never die Smile. ******** 06-30-06, 12:07 AM methos Missing what? That sounds vaguely like... well... the American use of Yanks. Wink
I should probably stop before Karrow gives me a flogging for bringing a post off-topic in my own forum Smile ******** 06-30-06, 01:34 AM Professor "...but it is also argued that there could be a risk of driver error in misreading speed limit signs." The first time I drove into Canada from the US, I was delighted to see that these sensible Canadians allowed posted speeds of 90! Alas, it was kph. ******** 06-30-06, 01:47 PM FredPuli
quote: Originally posted by Professor: "...but it is also argued that there could be a risk of driver error in misreading speed limit signs." The first time I drove into Canada from the US, I was delighted to see that these sensible Canadians allowed posted speeds of 90! Alas, it was kph.
Yeah but it's a great 'defence' (All right, mitigation, but it's sure to save you Big Grin )
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