flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
Posts: 51
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Post by flutterby on Sept 1, 2010 4:00:25 GMT
I was thinking of putting my heat mat on the lid of my tank. Its a plastic tank and all the holes are in the top, so i thought that the heat would get through better. My tank is 7'' from substrate to lid, 9'' from bottom of tank to lid. Would the short range IR waves reach this far? Don't worry there's still holes enough for them to breathe (I also know about insulation on the back of the mat already, i have a plastic chopping board, bubble wrap, tin foil construction lol.)
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Post by laurent on Sept 1, 2010 8:36:19 GMT
Hi,
I'm not sure this would be very effective, heat does tend to go up so you'd probably loose a lot of it. If you try it, I'd be happy to know how it worked.
Laurent
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Post by AlienSnail on Sept 1, 2010 9:05:33 GMT
Your better off drilling some small holes into the side of the tank where the heatmat already is, to let the heat through better. I also find that insulating the bottom of the tank helps prevent the cold seaping through the bottom into the core. Even though heat rises I do find that I get some heat loss and end up with cold coir in certain tanks in cold weather when there's no bottom insulation.
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Post by Alisha on Sept 1, 2010 11:41:42 GMT
Hi, I'm not sure this would be very effective, heat does tend to go up so you'd probably loose a lot of it. If you try it, I'd be happy to know how it worked. Laurent Wrong. I learnt in my GSCE physics lesson that heat does not go up all the time. Heat travels to places where the air is cooler. This may be by convection, conduction or radiation, this may be down, left, right or possibly up.
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flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
Posts: 51
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Post by flutterby on Sept 1, 2010 22:49:36 GMT
heat rising isnt an issue for heat mats, they heat by short wave IR rays. so saying they go up is like saying u have to point ur tv remote down so the wave goes into the tv receiver lol.
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flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
Posts: 51
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Post by flutterby on Sept 1, 2010 22:59:31 GMT
Actually Alisha, hot air rises above cold air because it is less dense, some will go down due to diffusion and stuff but the move averages out to an upward movement as the movement upwards is greater than the movement downwards. Its like a less extreme example of a helium balloon. (also the diffusion e.c.t. is why the heat spreads as it rises, it does go alittle bit left, right kinda thing)
I have physics A-level and am training to be a science teacher (currently doing a chemistry degree to go on to a PGCE).
Don't worry all the methods of heat transfer do get a bit messy.
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Post by Alisha on Sept 2, 2010 9:50:30 GMT
The heat will still get to the air at the bottom won't it? I thought a heat mat transfered heat in the way of a convection current somewhat?
I like science but I wish our teachers wouldn't keep telling us something, and then next year telling us something else. It's confusing. Like last year they told us that you can seperate a solution using a filter, but then this year they explained to us that you can, but it has to be a very fine type of filter. It's stupid.
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flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
Posts: 51
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Post by flutterby on Sept 3, 2010 20:12:54 GMT
convection current is like say you have a radiator, the air round it gets hot and rises, this air cools and then goes back down again to be heated by the radiator, hence creating a current. If you have curtains above a radiator you can sometimes see them move like being blown by te breeze, its the hot air rising that moves them. Don't worry about science, they teach you wrong stuff coz the reality is too complicated they just want you to get into a certain way of thinking, like in chemistry everything you learn at GCSE is wrong pretty much.
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Post by AlienSnail on Sept 3, 2010 20:46:19 GMT
convection current is like say you have a radiator, the air round it gets hot and rises, this air cools and then goes back down again to be heated by the radiator, hence creating a current. If you have curtains above a radiator you can sometimes see them move like being blown by te breeze, its the hot air rising that moves them. Don't worry about science, they teach you wrong stuff coz the reality is too complicated they just want you to get into a certain way of thinking, like in chemistry everything you learn at GCSE is wrong pretty much. I love this stuff but didn't take it as far as you. I was good at science at school but since then I've not learned THAT much more and my memory for details is naff at times. Chemistry is cool. I was looking at the structure of atoms a few weeks back on a higher-that-GCSE-site and it's one example of things not being like the standard science books you see. They don't really look like the Sun with planets going round in carefully organised orbits. The things is though I learn stuff and I forget it too easily!
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flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
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Post by flutterby on Sept 6, 2010 0:51:43 GMT
electrons in atoms is quite kool. like u said, they're not like planets round a sun. and the orbital diagrams that do exist just show electron density i.e. just where the electrons are most likely to be. theres s-orbital, which is spherical and p orbial which is like an 8 shape but 3D, a bit like monkey nuts still in there shell (penuts in shells) and then d orbitals which are just crazy, they're a bit like 2 of the p orbitals together, and f orbitals are even more crazy. its brilliant!
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Post by AlienSnail on Sept 6, 2010 5:40:53 GMT
electrons in atoms is quite kool. like u said, they're not like planets round a sun. and the orbital diagrams that do exist just show electron density i.e. just where the electrons are most likely to be. theres s-orbital, which is spherical and p orbial which is like an 8 shape but 3D, a bit like monkey nuts still in there shell (penuts in shells) and then d orbitals which are just crazy, they're a bit like 2 of the p orbitals together, and f orbitals are even more crazy. its brilliant! Yeah, I was looking at them with my lad. He's not learning about them yet but he loves chemestry, we were looking at how you would write down the 'formula' (for want of a better word) on how electrons are arranged around the centre. t'was cooool. Oh that makes me sound like a total geek. What is the world made of? Electrons, protons, and crispy crutons QUARK!
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Post by muddydragon on Sept 6, 2010 14:27:35 GMT
it is one of those cases where it's imposible to do an acurate diagram. merely diagrams to assit with the understanding of one aspect. if you like physics without all the complicated maths i really recommend alice in quantum land (an allegory of quantum physics) by robert gilmore. it starts of with the basic stuff, up/down electrons etc and goes on as alice explores the world on the quantum level meeting various creatures and people and places (like classical physicists, quantum tunnelling rabbits etc, the energy bank, where things can borrow energy to come into existance etc) it can be read just as a story which gets the main ideas across but theres also info boxes with more information. it's great fun! my GCSE physics was AWFUL just work out the amount you will spend on your electricity bill and rubbish like that. i only did it at A level because i knew it could be good. i really think instead of the rubbish i did at GCSE they should have just read us alice in quantum land, i really do. Maybe quark finally got incredibly successful and once dead, in the true ferangi fashion, got cut up and sold off, maybe so many fakes etc were made they became the constituants of everything! or maybe he only became the strange quarks... one dreads to think the origin of bottom quarks... Rom was more sucessful in engineering and invented CD-Roms.... or maybe not.... maybe everything is made from the cheese..... but what about morn?
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Post by AlienSnail on Sept 7, 2010 14:58:33 GMT
Haha Quark! yes I remember him, not seen Deep Space 9 for some time, used to enjoy that. Quark was little money grabber, and Morn was his pal right? Or at least a regular aquantence. Can't quite remember. Hmm I may well look out for that book you mentioned. Thanks
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flutterby
Juvenile
aren't i cute, nomming ur cucumber XD
Posts: 51
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Post by flutterby on Sept 8, 2010 1:16:48 GMT
'one dreads to think the origin of bottom quarks...' pmsl!!! eww too physicsy for me, gggrrrrrrr!!! i feel slightly nauseous at the thought of it lol
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