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Reflecting cold
url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0
Reflecting cold? That's an interesting concept. |
Reflecting cold
On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote:
url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... |
Reflecting cold
Jules Richardson wrote:
On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Chris -- Chris J Dixon Nottingham UK Have dancing shoes, will ceilidh. |
Reflecting cold
"Chris J Dixon" wrote in message ... Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. |
Reflecting cold
Does not sound very scientific does it.
At that rate I could make a very interesting refrigerator. Brian -- Brian Gaff - Note:- In order to reduce spam, any email without 'Brian Gaff' in the display name may be lost. Blind user, so no pictures please! "Grimly Curmudgeon" wrote in message ... url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. |
Reflecting cold
On 08/11/2011 01:38, Grimly Curmudgeon wrote:
url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. |
Reflecting cold
On Nov 8, 1:38*am, Grimly Curmudgeon
wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. On the other hand, being sat next to a cold surface is uncomfortable. |
Reflecting cold
On Tue, 08 Nov 2011 08:35:24 +0000
Hugh - Was Invisible wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. -- Davey. |
Reflecting cold
Hugh - Was Invisible wrote:
On 08/11/2011 01:38, Grimly Curmudgeon wrote: url: http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. A friend of ours, no really, used some wide aluminiumium cooking foil, just draped and stuffed it down as best he could .. it worked so well he did it all over his house! -- Paul - xxx "You know, all I wanna do is race .. and all I wanna do is win" Mark Cavendish, World Champion 2011. |
Reflecting cold
In message
, harry writes On Nov 8, 1:38*am, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. On the other hand, being sat next to a cold surface is uncomfortable. Apparently. My wife has what must politely be called a *substantial* nose. Seated in front of our lounge TV, I often find her face shrouded in a scarf. We have large window openings to either side and the loss of radiated heat causes her some discomfort. Somebody once tried to explain *black body* radiation to me. AFAIR everything absorbs incident radiation at infra red wavelengths and then re-radiates it. The walls bounce back all they receive but the windows do not absorb much and consequently feel cold. One of our physicists may explain it better:-) regards -- Tim Lamb |
Reflecting cold
On 08/11/2011 09:47, Davey wrote:
On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. You want the version that comes in squares about 60cm on a side and 2mm thick. There is a roll version about 1mm thick that is not as good, It is surprisingly effective used on outside walls behind radiators. It should be in season now next to rockwool and other insulation in B&Q/Wickes. Obvious keywords should get it. -- Regards, Martin Brown |
Reflecting cold
On Tue, 08 Nov 2011 11:38:46 +0000
Martin Brown wrote: On 08/11/2011 09:47, Davey wrote: On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. You want the version that comes in squares about 60cm on a side and 2mm thick. There is a roll version about 1mm thick that is not as good, It is surprisingly effective used on outside walls behind radiators. It should be in season now next to rockwool and other insulation in B&Q/Wickes. Obvious keywords should get it. Thanks! I looked a few weeks ago, and did not see that on the manufacturers' websites. Maybe it's a seasonal thing. Thanks again. -- Davey. |
Reflecting cold
On 08/11/2011 10:16, Tim Lamb wrote:
Reflecting cold? That's an interesting concept. On the other hand, being sat next to a cold surface is uncomfortable. Apparently. My wife has what must politely be called a *substantial* nose. Seated in front of our lounge TV, I often find her face shrouded in a scarf. We have large window openings to either side and the loss of radiated heat causes her some discomfort. Somebody once tried to explain *black body* radiation to me. AFAIR everything absorbs incident radiation at infra red wavelengths and then re-radiates it. The walls bounce back all they receive but the windows do not absorb much and consequently feel cold. One of our physicists may explain it better:-) IANAP I am more than a little rusty on this so may have a few of the niceties wrong but AIUI: Black bodies are so called because they absorb and radiate all frequencies. In the real world most objects reflect some frequencies rather than absorbing them (they must do one or the other) which is why we have coloured objects. All objects above absolute zero radiate to some extent, even cold walls and substantial noses. Such radiation varies with the forth power of absolute temperature so you get quite a noticeable difference even with relatively minor differences in temperature. Some surfaces radiate much better than others as anyone with a thermometer that uses infra red should have learned by now. I can get good reading from painted radiators but have to stick on a bit of black tape to get much response from copper pipes (a matter of emissivity I believe). Glass reflects so it will radiate comparatively little so windows should appear colder. They should usually also feel colder to the touch as even double glazing tends to be a worse insulator than all but thinnest of solid walls. All this off the top of my head so take it with a pinch of salt until a real scientist comes along and pulls it apart. -- Roger Chapman |
Reflecting cold
On Tue, 08 Nov 2011 12:43:59 +0000, Roger Chapman wrote:
Glass reflects so it will radiate comparatively little so windows should appear colder. Glass is complicated in that it's transmission/reflection abilties varies with IR frequency. I *think* glass will transmit the higher frequency IR radiation but reflect the lower. So sunlight with high levels of HF IR gets through this is absorbed by objects behind the glass which reraditates it at lower freqencies which the glass reflects. This is how greenhouses work... They should usually also feel colder to the touch as even double glazing tends to be a worse insulator than all but thinnest of solid walls. Yep, and in the context of IR radiation anything that does go through isn't likely to come back. -- Cheers Dave. |
Reflecting cold
In article , Grimly
Curmudgeon writes url:http://www.buy4now.ie/woodiesdiy/pro...46&loc=P&catid =110.0 Reflecting cold? That's an interesting concept. That is MBS of course but if these products are installed in their very specific and controlled operating environment then they do operate in 2 ways that are equivalent to the what was quoted: 1. They reflect heat back into the room (on the inside) 2. They oppose radiation of heat to the outside world (the cold side) Whether they provide these features effectively in everyday installations is another matter and it is an issue that I have actively questioned here in the past. These product are required to be installed with a draught free cavity on both inside and outside, and specifically rely on the reflective surface remaining free from dirt for the life of the installation. I regard both of these conditions as highly unlikely to be achieved in typical installations and have been achieved in precisely none on the installations I have witnessed these products in use. In short, waste of money, barely more effective than a cheap layer of ordinary bubble wrap in the same space. Better still, use some real, proven insulation such as PIR foam. Expensive snake oil. -- fred it's a ba-na-na . . . . |
Reflecting cold
On Nov 8, 9:47*am, Davey wrote:
On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was Invisible wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. -- Davey. Even this stuff? http://www.toolstation.com/shop/Cons.../sd2738/p26805 It's only about 3 or 4 mm thick. If your radiator is that close to the wall it needs mounting further way to allow airflow up the back. Andrew |
Reflecting cold
On Tue, 8 Nov 2011 07:16:56 -0800 (PST)
1970alr wrote: On Nov 8, 9:47Â*am, Davey wrote: On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was Invisible wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. -- Davey. Even this stuff? http://www.toolstation.com/shop/Cons.../sd2738/p26805 It's only about 3 or 4 mm thick. If your radiator is that close to the wall it needs mounting further way to allow airflow up the back. Andrew Thanks, that looks good. They don't actually say how thick it is, just the l x w dimensions, but 3 or 4 mm would be fine. Having lived in the US until recently, I don't know the places to look for stuff over here yet, so guidance is appreciated. -- Davey. |
Reflecting cold
On Tue, 8 Nov 2011 09:47:13 +0000, Davey wrote:
On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was Invisible wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. http://www.toolstation.com/shop/Cons.../sd2738/p26805 Put some behind the rads. last year. Needs a good adhesive as it doesn't transmit much vapour. -- Peter. The gods will stay away whilst religions hold sway |
Reflecting cold
On Nov 8, 9:47*am, Davey wrote:
On Tue, 08 Nov 2011 08:35:24 +0000 Hugh - Was Invisible wrote: On 08/11/2011 01:38, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. Reminds me. Under the lounge window we have a radiator about 8 feet long with a solid 9 inch block wall behind it. Could do with some reflective insulating stuff behind it. I need some as well, but I can't find any that is thin enough to slip back there. It's either too thick and won't fit, or comes in a roll from the kitchen dept. of Morrisons. Maybe I need to start glueing foil to cardboard. -- Davey. Even this stuff? http://www.toolstation.com/shop/Cons.../sd2738/p26805 It's only about 3 or 4 mm thick. If your radiator is that close to the wall it needs mounting further way to allow airflow up the back. Andrew |
Reflecting cold
On Tue, 08 Nov 2011 10:41:15 +0000, Terry Fields wrote:
Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. These are not trivial amounts: the average human body receives about 400W of radiant heat from indoor surroundings, and radiates about 330W in turn. To stay in heat balance, the difference of 70W is made up by burning food by the body. If the body receives 400 and emits 330 the temperature of the body would rise until the themal losses = the gains at which time we would be in thermal equilibrium :-) Zeroth law IIRC -- (º€¢.¸(¨*€¢.¸ ¸.€¢*¨)¸.€¢Âº) .€¢Â°€¢. Nik .€¢Â°€¢. (¸.€¢Âº(¸.€¢Â¨* *¨€¢.¸)º€¢.¸) |
Reflecting cold
These are not trivial amounts: the average human body receives about 400W of radiant heat from indoor surroundings, and radiates about 330W in turn. To stay in heat balance, the difference of 70W is made up by burning food by the body. If the body receives 400 and emits 330 the temperature of the body would rise until the themal losses = the gains at which time we would be in thermal equilibrium :-) Zeroth law IIRC "the difference of 70W is made up by burning food by the body" Read it again |
Reflecting cold
On 08/11/2011 17:46, Newshound wrote:
These are not trivial amounts: the average human body receives about 400W of radiant heat from indoor surroundings, and radiates about 330W in turn. To stay in heat balance, the difference of 70W is made up by burning food by the body. If the body receives 400 and emits 330 the temperature of the body would rise until the themal losses = the gains at which time we would be in thermal equilibrium :-) Zeroth law IIRC "the difference of 70W is made up by burning food by the body" Read it again My money would be on the figures being quoted the wrong way round. (Not that I am prepared to bet on anything less than a dead cert so no money is offered). -- Roger Chapman |
Reflecting cold
In message m,
"dennis@home" writes "Chris J Dixon" wrote in message .. . Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. -- Ian |
Reflecting cold
On 8/11/2011 2:38 p.m., Grimly Curmudgeon wrote:
url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. If heat is infra-red EM radiation, what is cold, I wonder? |
Reflecting cold
On 8/11/2011 11:16 p.m., Tim Lamb wrote:
In message , harry writes On Nov 8, 1:38 am, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. On the other hand, being sat next to a cold surface is uncomfortable. Apparently. My wife has what must politely be called a *substantial* nose. Seated in front of our lounge TV, I often find her face shrouded in a scarf. We have large window openings to either side and the loss of radiated heat causes her some discomfort. Somebody once tried to explain *black body* radiation to me. AFAIR everything absorbs incident radiation at infra red wavelengths and then re-radiates it. The walls bounce back all they receive but the windows do not absorb much and consequently feel cold. One of our physicists may explain it better:-) regards In this case feeling cold is more related to the conducting properties of the glass. If instead of glass you had a sheet of steel it would feel just as cold, since what you are feeling is basically the temperature outside. In both cases the temperature drop across the sheet is quite small. The temperature in the room is determined by (among other things) the sum of the amount of radiant heat going out the window and the amount of heat conduction through the window. With steel instead of glass the conduction would be more, but the radiant loss would be zero. It's not clear (to me) without doing some calculations which would make the room warmer, but I suspect that the conduction loss dominates. |
Reflecting cold
On 9/11/2011 5:16 a.m., Ghostrecon wrote:
On Tue, 08 Nov 2011 10:41:15 +0000, Terry Fields wrote: Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. These are not trivial amounts: the average human body receives about 400W of radiant heat from indoor surroundings, and radiates about 330W in turn. To stay in heat balance, the difference of 70W is made up by burning food by the body. If the body receives 400 and emits 330 the temperature of the body would rise until the themal losses = the gains at which time we would be in thermal equilibrium :-) Zeroth law IIRC In any case more heat is lost from the body by conduction-convection than by radiation, I believe. Evaporative cooling (sweat) can also be very significant. |
Reflecting cold
On 9/11/2011 3:33 a.m., fred wrote:
That is MBS of course but if these products are installed in their very specific and controlled operating environment then they do operate in 2 ways that are equivalent to the what was quoted: 1. They reflect heat back into the room (on the inside) 2. They oppose radiation of heat to the outside world (the cold side) Whether they provide these features effectively in everyday installations is another matter and it is an issue that I have actively questioned here in the past. These product are required to be installed with a draught free cavity on both inside and outside, and specifically rely on the reflective surface remaining free from dirt for the life of the installation. I regard both of these conditions as highly unlikely to be achieved in typical installations and have been achieved in precisely none on the installations I have witnessed these products in use. In short, waste of money, barely more effective than a cheap layer of ordinary bubble wrap in the same space. Better still, use some real, proven insulation such as PIR foam. Expensive snake oil. Sounds about right, and consistent with the MBS. |
Reflecting cold
On Nov 8, 9:16*pm, Gib Bogle wrote:
On 8/11/2011 2:38 p.m., Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. If heat is infra-red EM radiation, what is cold, I wonder? Cold is the absorption of heat isn't it - it's a heat sink. The first winters in this cottage were pretty miserable - just as well we were young. Possibly late 18th century build with 3 ft thick stone walls, it was probably warmer when built than when it was upgraded in the late 1920's to have a proper wooden floor and lathe and plaster on the walls, but they didn't put two and two together that all the under floor ventilating air just circulated up behind the L and P and out through the rood space, so the room insulation was just 2cm of plaster, above and all round; the basic coal fire would radiantly heat your front and the walls just seemed to suck all your warmth away from your back. Rob |
Reflecting cold
On Tue, 8 Nov 2011 21:02:32 +0000
Ian Jackson wrote: In message m, "dennis@home" writes "Chris J Dixon" wrote in message .. . Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. I think it's time to resurrect the Phlogiston theory. -- Davey. |
Reflecting cold
On Tue, 8 Nov 2011 22:54:15 +0000, Davey
wrote: On Tue, 8 Nov 2011 21:02:32 +0000 Ian Jackson wrote: In message m, "dennis@home" writes "Chris J Dixon" wrote in message .. . Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. I think it's time to resurrect the Phlogiston theory. And miasma/contagion :-) Actually the idea of hot/cold isn't too silly. In the morning I open the living-room curtains to let the darkness out, which is just the reverse logic to letting the light in. It's all relative/relativity really innit... -- Frank Erskine |
Reflecting cold
On Tue, 8 Nov 2011 14:38:58 -0800 (PST), robgraham
wrote: On Nov 8, 9:16*pm, Gib Bogle wrote: On 8/11/2011 2:38 p.m., Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=14046&loc=P&c... Reflecting cold? That's an interesting concept. If heat is infra-red EM radiation, what is cold, I wonder? Cold is the absorption of heat isn't it - it's a heat sink. The first winters in this cottage were pretty miserable - just as well we were young. Possibly late 18th century build with 3 ft thick stone walls, it was probably warmer when built than when it was upgraded in the late 1920's to have a proper wooden floor and lathe and plaster ITYF it's "lath and plaster". A lathe is a machine for turning e.g. wood or metal.. HTH -- Frank Erskine |
Reflecting cold
Ian Jackson wrote:
In message m, "dennis@home" writes "Chris J Dixon" wrote in message ... Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. *shrug* Its a theory. But really, what isn't? (serious deep question) |
Reflecting cold
Gib Bogle wrote:
On 8/11/2011 2:38 p.m., Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/pro...=P&catid=110.0 Reflecting cold? That's an interesting concept. If heat is infra-red EM radiation, what is cold, I wonder? A virus |
Reflecting cold
On Tue, 8 Nov 2011 22:54:15 +0000, Davey wrote:
On Tue, 8 Nov 2011 21:02:32 +0000 Ian Jackson wrote: In message m, "dennis@home" writes "Chris J Dixon" wrote in message ... Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. I think it's time to resurrect the Phlogiston theory. An expectorant will help to get rid of that. -- Peter. The gods will stay away whilst religions hold sway |
Reflecting cold
"The Natural Philosopher" wrote in message ... *shrug* Its a theory. But really, what isn't? (serious deep question) The idea that the mass of an object changes depending on how much energy it has isn't according to you. |
Reflecting cold
On Wed, 09 Nov 2011 00:14:59 +0000
Frank Erskine wrote: On Tue, 8 Nov 2011 22:54:15 +0000, Davey wrote: On Tue, 8 Nov 2011 21:02:32 +0000 Ian Jackson wrote: In message m, "dennis@home" writes "Chris J Dixon" wrote in message .. . Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. I think it's time to resurrect the Phlogiston theory. And miasma/contagion :-) Actually the idea of hot/cold isn't too silly. In the morning I open the living-room curtains to let the darkness out, which is just the reverse logic to letting the light in. It's all relative/relativity really innit... Relatively speaking, yes it is. So how do we deal with those people who annoyingly describe something as being 'three times smaller' than something else? -- Davey. |
Reflecting cold
dennis@home wrote:
"The Natural Philosopher" wrote in message ... *shrug* Its a theory. But really, what isn't? (serious deep question) The idea that the mass of an object changes depending on how much energy it has isn't according to you. Well that's what the theory of relativity says... and the instruments say.. |
Reflecting cold
Davey wrote:
On Wed, 09 Nov 2011 00:14:59 +0000 Frank Erskine wrote: On Tue, 8 Nov 2011 22:54:15 +0000, Davey wrote: On Tue, 8 Nov 2011 21:02:32 +0000 Ian Jackson wrote: In message m, "dennis@home" writes "Chris J Dixon" wrote in message ... Jules Richardson wrote: On Tue, 08 Nov 2011 01:38:12 +0000, Grimly Curmudgeon wrote: url:http://www.buy4now.ie/woodiesdiy/productdetail.aspx? pid=14046&loc=P&catid=110.0 Reflecting cold? That's an interesting concept. It's like photocopying cold to make it warmer... Perhaps it comes from the same school of thought that tells us electric current flows in the opposite direction to the electrons. Oh come on, everyone knows its the holes that go that way. And that light bulbs work by sucking the darkness in. I think it's time to resurrect the Phlogiston theory. And miasma/contagion :-) Actually the idea of hot/cold isn't too silly. In the morning I open the living-room curtains to let the darkness out, which is just the reverse logic to letting the light in. It's all relative/relativity really innit... Relatively speaking, yes it is. So how do we deal with those people who annoyingly describe something as being 'three times smaller' than something else? harrys, Drivels or dennisses? |
Reflecting cold
On 09/11/2011 10:07, dennis@home wrote:
"The Natural Philosopher" wrote in message ... *shrug* Its a theory. But really, what isn't? (serious deep question) The idea that the mass of an object changes depending on how much energy it has isn't according to you. So something gets heavier (or perhaps lighter) depending how hot it is is a new one on me. Were can I find the details of this certain fact? -- Roger Chapman |
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