digger Posted February 14, 2007 Report Share Posted February 14, 2007 Asked my daughter today the following question : if its zero degrees how cold is it if its twice as cold ? What the hell is twice as cold as zero ? One answer in my office was -100, i dont think so somehow. Any ideas ? And yes, I am bored. Quote Link to comment Share on other sites More sharing options...
black hat Posted February 14, 2007 Report Share Posted February 14, 2007 2x0 =0degree Quote Link to comment Share on other sites More sharing options...
darebear Posted February 14, 2007 Report Share Posted February 14, 2007 does that rule apply here? because if you are talking about colder than 0 degrees, it means it has to be minus. so would it not be -1? -shrugs- just a thought. got any maths whizzes here? Quote Link to comment Share on other sites More sharing options...
tiercel Posted February 14, 2007 Report Share Posted February 14, 2007 Me thinks Darebear has hit the nail on the head. However, for it to be "twice as cold" IE 2 x as cold, it would have to be -2? Quote Link to comment Share on other sites More sharing options...
darebear Posted February 14, 2007 Report Share Posted February 14, 2007 my head hurts Quote Link to comment Share on other sites More sharing options...
flash Posted February 14, 2007 Report Share Posted February 14, 2007 simple maths, what is 2x0, the answer is nothing, as u cant multiply something by nothing. good old GCSE maths. Quote Link to comment Share on other sites More sharing options...
darebear Posted February 14, 2007 Report Share Posted February 14, 2007 simple maths, what is 2x0, the answer is nothing, as u cant multiply something by nothing. good old GCSE maths. reread my reply. colder than 0 has to be minus doesnt it? so like i said, does that rule apply here? p.s. a'level maths Quote Link to comment Share on other sites More sharing options...
tiercel Posted February 14, 2007 Report Share Posted February 14, 2007 simple maths, what is 2x0, the answer is nothing, as u cant multiply something by nothing. good old GCSE maths. 0 degrees is just a number on a scale. Ranging from - to + Quote Link to comment Share on other sites More sharing options...
flash Posted February 14, 2007 Report Share Posted February 14, 2007 if you are using the Celsius scale, zero degrees is actually 273.15 degrees above absolute zero. So, twice as cold would be -136.575 degrees Celsius. Similarly, absolute zero in Fahrenheit is -459.67. Thus, from zero degrees F, twice as cold would be -229.835 degrees F. Quote Link to comment Share on other sites More sharing options...
tiercel Posted February 14, 2007 Report Share Posted February 14, 2007 my head hurts And mine I give in Quote Link to comment Share on other sites More sharing options...
CarlC Posted February 14, 2007 Report Share Posted February 14, 2007 You can`t double(x) it as it`s NOT a number. Quote Link to comment Share on other sites More sharing options...
tiercel Posted February 14, 2007 Report Share Posted February 14, 2007 You can`t double(x) it as it`s NOT a number. Carl in this case x = multiply. Take it you did not do algibra at school? Quote Link to comment Share on other sites More sharing options...
darebear Posted February 14, 2007 Report Share Posted February 14, 2007 You can`t double(x) it as it`s NOT a number. Carl in this case x = multiply. Take it you did not do algibra at school? algebra* i take it you didnt do english at school? Quote Link to comment Share on other sites More sharing options...
pin Posted February 14, 2007 Report Share Posted February 14, 2007 if you are using the Celsius scale, zero degrees is actually 273.15 degrees above absolute zero. So, twice as cold would be -136.575 degrees Celsius. Similarly, absolute zero in Fahrenheit is -459.67. Thus, from zero degrees F, twice as cold would be -229.835 degrees F. You mean Kelvin, but yes Quote Link to comment Share on other sites More sharing options...
SNAKEBITE Posted February 15, 2007 Report Share Posted February 15, 2007 At least no one has said "Degrees Kelvin" yet! That is a pet hate of mine, yes I know I should get out more. Quote Link to comment Share on other sites More sharing options...
tiercel Posted February 15, 2007 Report Share Posted February 15, 2007 You can`t double(x) it as it`s NOT a number. Carl in this case x = multiply. Take it you did not do algibra at school? algebra* i take it you didnt do english at school? What was school? Quote Link to comment Share on other sites More sharing options...
Axe Posted February 15, 2007 Report Share Posted February 15, 2007 Asked my daughter today the following question :if its zero degrees how cold is it if its twice as cold ? What the hell is twice as cold as zero ? One answer in my office was -100, i dont think so somehow. Any ideas ? And yes, I am bored. Thats one of those questions that should be asked at the pub when eveyone's had a couple and the conversation has dried a little. It fits snugly alongside 'What is the meaning of life' and 'The theory of space, time & relativity'. Personally I subscribe to it being a simple calculation in mathematics. We can all agree on twice as much being the initial value added to itself. So we can deduce that twice as cold is the opposite of twice as much, therfore we must subtract the initial value from itself. Since 0-0=0 we are at a loss. Aha but we are not because 0 is the answer. Stick with me on this one..... Convert 0°C to F and you get 32°F. If you then subtract 32 you get 0°F. Therefore Twice as cold as 0°C is 0°F. Quote Link to comment Share on other sites More sharing options...
webber Posted February 15, 2007 Report Share Posted February 15, 2007 I agree that the degrees Kelvin route is the correct method with regartds to scale. At the moment I'm too ill to be bothered getting my head around the maths. My head hurts, but for different reasons than some of of the respondents to this poser. webber Quote Link to comment Share on other sites More sharing options...
Millomite Posted February 15, 2007 Report Share Posted February 15, 2007 If the temperature today is zero degrees and tommorrow the temperature is going to be twice as cold how cold will it be? That would depend on what temperature scale you are using. The scale which places zero degrees at the absolutely coldest point is called Kelvin. It has the same degree divisions as Celsius does. "Absolute zero," or zero degrees Kelvin, is the coldest temperature possible. This is the temperature at which all molecules stop all movement. So, if you are measuring in Kelvin, twice as cold is not possible. (0/2=0) However, if you are using the Celsius scale, zero degrees is actually 273.15 degrees above absolute zero. So, twice as cold would be -136.575 degrees Celsius. Similarly, absolute zero in Fahrenheit is -459.67. Thus, from zero degrees F, twice as cold would be -229.835 degrees F. Note that, due to the different scales in Celsius and Fahrenheit, just as zero degrees C and zero degrees F are not equal, neither is "twice as cold." Quote Link to comment Share on other sites More sharing options...
darebear Posted February 15, 2007 Report Share Posted February 15, 2007 ummmmmm yeah...... wot millomite said. (pssst, what did he say? ) Quote Link to comment Share on other sites More sharing options...
Peter_HMR Posted February 15, 2007 Report Share Posted February 15, 2007 Well if 0*C is cold then twice as cold would be ******* cold You could look at it as being relative if the average temp of the last few days was 5*C then when it was 0*C it would be 5*C less than normal so twice as cold would be (5x2) = 10* less than normal which would be -5*C on the scale Quote Link to comment Share on other sites More sharing options...
Millomite Posted February 15, 2007 Report Share Posted February 15, 2007 Well if 0*C is cold then twice as cold would be ******* cold You could look at it as being relative if the average temp of the last few days was 5*C then when it was 0*C it would be 5*C less than normal so twice as cold would be (5x2) = 10* less than normal which would be -5*C on the scale No it wouldn't. See above Quote Link to comment Share on other sites More sharing options...
Peter_HMR Posted February 15, 2007 Report Share Posted February 15, 2007 Its one way of looking at it anyway i'm no physicist what do i know. Quote Link to comment Share on other sites More sharing options...
pin Posted February 15, 2007 Report Share Posted February 15, 2007 http://betweenborders.com/curiosities/twice-as-cold-as-0c/ Quote Link to comment Share on other sites More sharing options...
Axe Posted February 15, 2007 Report Share Posted February 15, 2007 The fact of the matter is that no matter how you approach this, you will never get a resolve if you use mathematics. Each of the most professional sounding answers you find on the net all state that it depends on the scale you use, be it Kelvin, Celcius, Farenheit etc. Its a bit like the Tempreture readout on my car, sometimes it reads +0 and sometimes it reads -0, how can that be? Yeah I know under 1 degree, but yo uget the point. the human brain can not compute infinity nor can it understand that space is infinite. Everything must have a start and a finish, so whats at the end of space?? I think its best just to accept that if its quite simply colder than 0 the folloing day, then its Twice as Cold as the day previous. Quote Link to comment Share on other sites More sharing options...
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