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Physics, Astronomy & Cosmology / Re: ESSENTIAL MAINTENANCE
« on: 06/02/2025 21:46:33 »
Mine is back to Ryanair holidays once more as normal.
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Geology, Palaeontology & Archaeology / Re: Why does Earth have tectonic plates?
« on: 06/02/2025 20:20:01 »
I would in a lay,an way expect the thermal contraction to give all liquid core planets tectonic plates, solid contracting as like the skin of porridge. Mars I would not expect to currently have tectonics but I would expect the remnants to exist, perhaps Venus' surface is too hot to exhibit the contraction, after all we know more about Pluto's surface.
Perhaps it is the moon.
Perhaps it is the moon.
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Physics, Astronomy & Cosmology / Re: ESSENTIAL MAINTENANCE
« on: 06/02/2025 19:44:51 »
If not are the consequences that my account starts posting clickbait and advertising?
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Technology / Re: Whatever Happened To Antennae?
« on: 01/02/2025 10:28:15 »
They also changed shape, those dishes and whatnot at the top of telephone towers of the 1960s are high powered long distance transmission transmission apparatus, not sure they could be classed as antennas in common parlance.
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Technology / Re: Whatever Happened To Antennae?
« on: 30/01/2025 23:08:22 »
The distance between receivers reduced. Satellites in space and receiver masts are common, that receiver has not only got closer( I can see it) it is also very big, about the size of a transit van. Ham radios still have substantial antennae, so do analogue radios.
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Plant Sciences, Zoology & Evolution / Re: Leather or Leatherette? Which is the most ethical?
« on: 29/01/2025 10:10:58 »I am assured by the car salesmen that the leatherette is very well perforated and it's a slightly more sophisticated compound material than just pure vinyl.Doing comedy now too I see.
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Plant Sciences, Zoology & Evolution / Re: Leather or Leatherette? Which is the most ethical?
« on: 28/01/2025 20:58:30 »
How do you plan on charging your environmentally neutral car?
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Plant Sciences, Zoology & Evolution / Re: Leather or Leatherette? Which is the most ethical?
« on: 28/01/2025 09:57:15 »Some web search results are suggesting that most leather is imported from countries that may very well be slaughtering the cattle just for the leather and possibly in very horrific ways to keep the skins in good shape.I can not believe the meat is not consumed, even in India where cow killing is illegal in some states, and how on earth are cows killed where the leather is not preserved?
Most environmental will probably be recycled plastic. Never did like leather to sit on, but if hard wearing is the thing I suppose I'd choose it. The best leather comes from cattle that are open range on grass, it keeps them clean and limits injuries and therefore scarring, this usually comes from South America, who export lots of beef too. I don't think there is much of an issue with animal welfare and slavery there, although workers rights may not be the best. I should think the tanning industry is where you will find any human rights issues.
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Question of the Week / Re: QotW - 24.01.31 - Can you separate crude oil without making petrol?
« on: 25/01/2025 06:48:29 »
Most oil undergoes a process called cracking to satisfy our insatiable appetite for petrols, oil is taken and the hydro carbon molecule chain length is broken down into shorter lengths.
The current crude oil production is the extraction of lighter more liquid oils, they are composed of shorter molecule lengths to begin with. Their composition means they are easier to extract due to their liquid nature and less energy is required in the processing of them, so they are the cheapest and offer the greatest profit, these are Saudi type light oils. The reserve of heavy oil type petrochemicals is greater than light oils that are used at present. If the price of oil rises, Canada becomes the largest oil reserve on earth due to its posession of things like tar sands which are bitumous. If you are requiring a majority of long chains in the furure these will become the cheapest and Saudi oil will become very expensive to utilise.
The current crude oil production is the extraction of lighter more liquid oils, they are composed of shorter molecule lengths to begin with. Their composition means they are easier to extract due to their liquid nature and less energy is required in the processing of them, so they are the cheapest and offer the greatest profit, these are Saudi type light oils. The reserve of heavy oil type petrochemicals is greater than light oils that are used at present. If the price of oil rises, Canada becomes the largest oil reserve on earth due to its posession of things like tar sands which are bitumous. If you are requiring a majority of long chains in the furure these will become the cheapest and Saudi oil will become very expensive to utilise.
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Technology / Re: Is producing our own petrol a viable idea?
« on: 23/01/2025 15:02:09 »Making fuel from co2 is entirely possible but it consumes a LOT of energy, energy that could be put to better use. Biowaste is a more reasonable source although the feedstock is limited in quantity. I too am fond of petrol(gasoline) power and the big problem with EVs is that if you run the battery down you need to have your vehicle recovered while an ice powered one just need a can of fuel to get back on the road.It is a good way of storing energy though Paul, maybe we could start pumping hydrocarbons back into the ground.
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Technology / Re: Is producing our own petrol a viable idea?
« on: 23/01/2025 14:57:13 »I see a lot of people buying those cheap diesel heaters.They make yes a lot heat, but you need a vent. Not very civilized, but how can you blame them. The energy companies on the other hand are just middlemen, they have never made/installed a single solar panel or wind turbine in their entire life.I shall inform you that many motorhome and caravan heaters are diesil, not gas, usually higher end stuff. For really stinky try the waste oil burner and pour in the used engine oil, sometimes employed in car repair garages, but now illegal to use the waste oil I believe.
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Technology / Is producing our own petrol a viable idea?
« on: 23/01/2025 13:18:57 »
I personally like the idea of petrol vehicles as they are quick to refuel, do not require pressurised vessels to contain it the fuel, are reasonably lightweight and cheap at the point of purchase, and if you live in America or some such place the fuel is also nice and cheep! So can we make our own fuel? I just do not feel electric cars are a viable alternative at present.
I have seen numerous ideas for this, from producing hydrocarbons from thin air through CO2 filtering, CO2 emmissions capture to using biowaste as a feedstock.
I have seen numerous ideas for this, from producing hydrocarbons from thin air through CO2 filtering, CO2 emmissions capture to using biowaste as a feedstock.
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General Science / Re: Bitcoin
« on: 23/01/2025 12:07:02 »
Yes, 20 percent of all bitcoin have been lost from a finite supply, which is why bitcoin is infeasable, along with unregulated currency, you end up with a supply problem one way or the other.
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Question of the Week / Re: QotW - 25.01.24 - Does chewing gum cause tinnitus?
« on: 20/01/2025 15:05:09 »
I would say probably to some degree. I have a sound in my ears I am aware of sometimes and very very occasionally my ears do exhibit a clear whirring sound which is like a 1940s TV UFO sound, I don't know what causes it, but it is distinct. Permanent tinnitus from ear damage is a world away from the general background tinnitus, I don't know what degree you have had tinnitus to.
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Just Chat! / Re: Why do women have so many clothes?
« on: 13/01/2025 19:57:04 »
Fashion, I am led to believe that clothes have a life expectancy of 6 months.
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Technology / Re: Does cold weather damage the batteries used in an EV?
« on: 12/01/2025 19:30:46 »Hi.As for the batteries, you would need to know the car specifics, if it has a battery heater, if it monitors it's temperature if it has different chemistries, I should email the manufacturer. I would call damage a "can not" Evan, technically you can directly use very high voltage power lines to recharge the battery, unfortunately it will probably damage the battery and possibly yourself. Just a matter of time?
I have just checked this. I think it's that Li-ion batteries should not be charged below freezing rather than that they cannot be charged. According to your suggested Batteryuniversity site, charging them below freezing temperature is always slow and would usually cause permanent damage resulting in lower battery performance.
That's not something that Tesla ever seem to mention - and it does seem that they use Li-ion batteries of some variant or another. Even with some clever technology it seems you would still be well advised to charge them at a small fraction of the usual rate when the temperature is below 0. So, taking a long trip in the winter and putting your vehicle onto a fast charger along the way may be very bad news for the batteries.
Best Wishes.
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Technology / Re: Does cold weather damage the batteries used in an EV?
« on: 12/01/2025 19:07:57 »Stats on the subject are still thin on the ground, but ICE cars are between 2 and 20 times more likely to catch fire than a BEV.Certain chemistry electric batteries catch fire, such as high performance tesla's, many are now different chemistries that are not a fire risk, so I would like to see figures on EVs that have dangerous batteries. Whilst safety in a car is one thing, safety in a house whilst sleeping is quite another, li ion batteries that catch fire are extremely destructive. I believe all large energy storage batteries for houses are of the non flammable type, there are many of those around and you never hear of 1 catching fire, even though they would burn a house down within seconds.
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Technology / Re: Does cold weather damage the batteries used in an EV?
« on: 11/01/2025 21:54:00 »
There is of course battery university, which says than lithium ion cannot be charged below 0C unless it is a specific chemistry, but I imagine that would lower the capacity, as all the various lithium chemistries seem to, so I doubt anything claiming high distance/power would be, such as the current set of wheeled crematoriums . Lots more on here about batteries on all types, far more than I understand but it's where I go to.
https://batteryuniversity.com/article/bu-410-charging-at-high-and-low-temperatures
https://batteryuniversity.com/article/bu-410-charging-at-high-and-low-temperatures
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Technology / Re: Does cold weather damage the batteries used in an EV?
« on: 11/01/2025 15:25:46 »Relevance / Background: Like a lot of people, I'm thinking of getting an EV (Electric Vehicle) soon. How many (British) winters will the batteries last? Have we had EV's for enough years to know how well they last? Also, how much range for the vehicle will usually be lost on the cold days?I'm waiting for sodium ion, they have none of these problems, should be far cheaper too. As for the cold weather performance dealers I have spoken to in a non customer situation tell me in winter they expect half the advertised mileage at present from evs but thats not a problem really for most in the UK. I suppose all of that hard accelleration and braking doesn't help.
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Just Chat! / The Greenland War
« on: 08/01/2025 19:02:19 »
With the fast approach of the Canadia and Green land war between Europe and the USA, I wonder whether Trump has seen the size of it on a map? Mercators projection has the habit of turning Greenland into a rival of Africa for size, a similar effect occurs for Canada. You have to wonder whether the impending terrible loss of life could be avoided if someone got him an atlas globe.
mercator-projection-world-map-political.png (1232.16 kB . 1320x839 - viewed 59 times)
mercator-projection-world-map-political.png (1232.16 kB . 1320x839 - viewed 59 times)