SteamyTea

Or a very fuel efficient car. Possibly a correlation between low level windspeed and temperature at the site. May also be a place to do a Covariance analysts with irradience.

Too large may be a problem if you are trying to maximise on your solar (the 7.3 kWp PV), but I can see your thinking. Should be fairly easy to work that out knowing the fabric areas and the temperature differences.

That such a small molecule, in tiny proportions to the surrounding gases, can make any difference. Right, had a sleep, and a think this morning and I think I shall work on the model in that chem.libretext.org link. I don't fully understand why the shape of the molecule i.e. linear or non-linear makes much difference, that will need more reading, but as it is only two equations to work out, it is easier to remember. For linear molecules like CO2 it is equation 1 3(N) - 5 For non-linear molecules like SO2 it is equation 2 3(N) - 6 Where N is the number of atoms. This does rely on knowing (or finding out) the shape of the molecules, and I am not sure how much difference the angles between the atoms makes i.e. H2) being 104.5°, SO2 being 119°C. Or how much difference the mass of a molecule makes. In classical physics, those two properties should make a difference. (think I may have asked myself the question to explain why the shape may be important) Some molecules like Sulfur tetrafluoride (SF4) have a degrees of freedom number of 9, as does CH4. SF4 has two angles of 101.6° and 173.1° CH4 only has 1 angle, 109.5° There is also a difference in the orbital distance between the nucleus and the electrons. SF4 is 154.5 pm and 164.6 pm depending on the fluorine pair. CH4 is 133.9 pm between the carbon atoms and 108.7 pm between the carbon and hydrogen atoms (this assumes that CH4 is always paired with another). I am starting to remember the real reasons I disliked chemistry at school, I thought it was because the teacher was a religious zealot (a Born Again Christian, whose name a still fully remember) but I think it is really because it was just a memory test.

Think I am going to sleep on it. It is hard to know what is actually happening, and then trying to find a clear and concise explanation for 'the man on the Clapham omnibus'. Probably why: It is not explained often Just expect to be taken on trust People don't believe it

Only 3.3 times worse. Propane molecule followed by Carbon Dioxide.

Bit more hunting around and I found this, but going to have to look up Raman to see what it is all about. https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Spectroscopy/Vibrational_Spectroscopy/Vibrational_Modes/Number_of_Vibrational_Modes_in_a_Molecule I think that I may have been confused in my thinking. Seems that the rotations and vibrations are between the atoms, not within the atoms, which kind of makes sense. Would be nice to work out a simple, but realistic, description or I shall be just like I think the first part is to treat incoming photons as particles, but the emitted IR as a wave (think one is allowed to do that, if you drop a stone in a pond you get a wave, but a wave does not create a stone). Thoughts anyone.

Bloody phone, I put in an autocorrect superscript, seems to want to do it every time I use the numbers 2 and 3.

Cladding Do something really horrible with the cladding, then ask the neighbours/planners if they still love your house.

That was what I first did, left the PC running for a few weeks. Found out that it had done an auto-update and rebooted. So no data. Was then I started to look at Linux, and still struggle with it all, especially as they changed the way that programs can auto start.

Hello Do you have any weather data for where you want to build? Knowing those parameters can help a fair bit, takes the guess work out of it, and solar radiation can add a lot of energy to a place (ask @Jeremy Harris). Also, a small place has a larger surface area to volume ratio, this is a killer when it comes to designing a low energy building, just too much wall.. The physics id pretty basic, two parts, the insulation reduces the power (the watts) that go though the wall, but once though, air movement sucks more power out. This is why there are a two parts to complex construction formula. First thing to look at is the R-Value of materials (make sure you pick the SI ones and not the funny American ones). The K.m2/W. Also air tightness is important, no point having a foot of insulation if there is a window open.

Similar to the light meters I have made using a LDR, and LDR and capacitor, and a webcam (I must get one of those going again as it was fun, but the local WeatherUnderground station with a good light meter on it has vanished, so can't calibrate).

Interesting problem came up today while I was having a coffee with a mate. Knowing that I was interested in climate change (actually it is weather I like) and being a curious fellow, he asked how atmospheric CO2 actually increased temperatures. A good question and one I found very hard to answer. Once, while at university, it was described as such: "It is the shape of the molecule and the degrees of freedom that it can rotate when hit by a photon." Now I quite liked that as it is a very mechanical description and can be used to describe different molecules having different properties. Hitting one end of a dumbbell is not the same as hitting a bicycle (a complex shaped molecule). So when I was chatting to a proper chemist (she has a PhD in it, tall and willowly, so someone worth hitting on), her response was: "don't talk to me about degrees of freedom, I hate them". She then went onto explain that it was do do with frequencies and resonance. This seems to be the usual description i.e. the EM radiation coming in is at a high frequency, so not much wave height/length, so misses the CO2 molecule. After hitting the ground, the EM radiation is reduced in frequency, increasing the wave height/length, so more chance of hitting the molecule. Which also happens to have a a 'gap' between the nucleus and the electrons that just happens to match that frequency, so it resonates. Now to be honest, I don't really understand how something resonates, even though I have seen it happen. So what clever things are happening there then? And is there a better description to how it happens? preferably a 'mechanical' one, as people seem to understand that better than sub-atomic voodoo.

I had a similar problem earlier in the year. But it just went to no readings. Bit of a problem because the batteries can last years, think I once I changed (the white optical sensor) was about 7 or 8 years old.

Starved to death then. Or could get in and out to feed. We had a vermin problem at work. Next door but one had a large, fat, female rat. They said there was no way it could get into their shop. When there were 12 rats, they decided to take action. Until that we had been fighting a battle to keep them out of our place. One of the problems is that local householders just dumped food into bin bags a day before collection. Had to get them on board too. One neighbour did not like the idea that we used poison. Because she had a couple of dogs. With 5 food businesses and 3 homes. Told her politely to piss off. The only real solution is to remove the food source, or you will have a reoccurring problem.

Remove the food supply. They will soon move on.

Still got the rules I bought when starting my apprenticeship. And still use them. Just look after your tools man.

My cheap energy monitor suddenly started giving a higher than expected daily total. Was my fridge stuck on due to loosing gas. Usually fairly simple to pinpoint odd usage patterns, it showed my immersion heater failing. But then do did like warm water. Biggest problem with energy monitoring us that you have to check on it. And then do something about it.

What do you use to collect that and is it just On or Off. Or a real unit reading. Same with occupancy. How is that done and does it record None, Some or Many. Or an actual number.

I bought a handful of a similar board (the ones that do MicroPython). What I found was, and may be a bit obvious from my responses, is that I could not really find things I wanted to control. So lost interest. I do keep meaning to rig one up with a few temperature sensors on it, but as I already have a RPi Zero W doing this, I can't see what I would gain. As for remote external lighting, I got a very cheap light from Poundland. It goes on my keyring and for those rare nights when there is no moon, it gets me out a hole.

Give them a lesson in environmental science by drawing straws. The short straw get to bath last. A they say up North 'that will learn them' or 'hard lines'. Unless they are from Yorkshire, then give them a sticky stick, they know which end to pick up.

It works fine for me. But the other day I count not open some links, but others could. So maybe it is the forum software that is at fault. Not sure what a leap year has to do with it, or would that be Office366

Just read the news online, first story is that all the address of the new years honours have been published online by mistake. We really cannot trust anyone with our data now. https://www.bbc.co.uk/news/uk-50929543 Are all those people going to have to move now.

Look into the local planning plan first. I know little about this, but there are areas that can easily be built on, and areas that cannot be easily built on. The look of the current buildings has nothing to do with planning really. And looks has little to do with planning anyway. My Father designed and built an electrical substation, he was very proud of it (bottom of Cryers Hill at the far end of Hughenden Park), was still a concrete block to everyone else.

Bit like SportsDirect making it clear that they treat all customers as criminals, even before you enter the shop. Was it not the BBC that did a bit about Alexa and set thousands of them off. And they can be tricked into switching on very easily by recording the keywords and upping the frequency so only dogs can hear it. I thought it was annoying when my neighbour found out that he could change my TV channel with his remote in 1984. Never did tell him that I could hear his girlfriend with her 'friends' when he was at work.

That will be 5G, will unshackle us from wires. I think I can stream on my 4G to my Kindle, but not tried anything larger.