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About Externet

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  • Location
    Mideast U.S.
  • Interests
    Old Cadillacs, scuba.
  • College Major/Degree
    Electronics engineer, audio recording engineer.
  • Favorite Area of Science
  • Biography
    Plain old fart tells it all.
  • Occupation
    Retired from electronics and shrimp farming.

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  1. Hi all. Comparing the nutritional value of a meal with protein, carbohydrates, lipids, vitamins and all the rest together, that was cooked with a microwave oven and one equal cooked with a convection, conduction method for cooking; should differ ? Is there a study about such, away from speculations ? Can different heat energy sources from radiant fire, microwaves, immersion in boiling, even concentrated solar radiation cookers or any other, alter nutrition or create more or less toxins ?
  2. Hi. How many kilowattshour are needed to create 1 Kg of hydrogen ? ----> https://news.stanford.edu/2019/03/18/new-way-generate-hydrogen-fuel-seawater/ Do not see much news of the electric vehicle Quantino these days . Another flop ?
  3. Hi. Has any manufacturer come up with some 3D copier yet ?
  4. Thanks again for your always extensive and complete expertise. Preference to filtered used cooking oil of the proper flash point will then be. Microwaves not considered as aiming to third world processing. Something in the style of : ----> https://www.youtube.com/watch?v=wPe5a8lGAhg Finding a product that highly motivates production is key. At some places they report motor oil, others cooking oil. ----> https://www.youtube.com/watch?v=594HFX_Oh40
  5. Greetings. Seen a couple of machines that melt shredded plastics in used hot oil for the process of recycling. Seems there is not much mixing as plastics being heavier, stay submerged by the bottom of the vessel in a nearly liquified state layer. Seems the oil is just the media to convey the heat source thoroughly. What would differ choosing used motor oil, used vegetable oil, used transmission fluid, used hydraulic oil ? Would any be more convenient than other ?
  6. Beautiful link; thank you, Strange. Witnessing the speed of light visually. The radius increasing 300,000Km every second. What is commonly referred a interstellar 'gas' and 'dust' can be 'particles' the size of planets and asteroids reflecting the light, right ?
  7. Hello all. Distance from earth to moon is 384,000 kilometres. Time light takes to travel that distance = over 1 second. 1 second of time is discernible. A space probe travelling to somewhere happens to be at a location with visual of both earth and moon. If a laser beam is directed from the earth towards the moon during 1 second, an observer at the probe with visual of both the earth and moon should see the 'rod' of light advancing between earth and moon during 1 second, or will appear instantaneous ?
  8. Thanks. Clearly, common oily compounds have around a quarter of thermal conductivity and specific heat as water has. A random document ----> http://www2.eng.cam.ac.uk/~mpfs/papers/articles/WTC2005/pdfs/t-3/WTC2005-64316.pdf There is specialized products that should be reasonable closer to water characteristics, if they are reasonably priced. An additional important benefit not mentioned in post #3 is avoiding rust in cooling chambers. Commercial example ----> https://www.mabayco.com/buy/heat-transfer-fluids/mobiltherm-605/
  9. Thank you, John. Respect to cheap, the antifreeze fluid that goes with the water is about $14/gal here. For the toxic part, a vehicle already has the antifreeze, the oils, fuel, the brake fluid, transmission fluid in it. For the flammable part, a vehicle already has is oils and fluids plus fuel. Exploring for an alternate oily coolant would not be of much impact. Am not trying to convince anyone to change. Ah... it would not boil that easy, would allow higher operating temperatures for more efficient/cleaner? operation, would not freeze that easy, no pressurizing needs, recycling/reusing possible... Is it considering such too far from reality ?
  10. Hi. Replacing water-based coolant in a ICE engine with a thin oily derivate that can perform near decently ? Like kerosene, transmission fluid, hydraulic oil, transformer, diesel, vegetable... Which could work, even increasing the radiator size, not boiling under 300F ?
  11. Thanks, gentlemen. So the contamination occurs by migration of the leaked radioactive atoms that get deposited on other materials nearby a 'perforated/leaky' container of radiactive elements. As I understand you. A hermetic vessel containing a ruptured radioactive atoms vessel stops contamination. OK.
  12. Hi. Do these F1 racing engines use a coolant thermostat ? In the liquid path; not louvers at the air flow path.
  13. Hi. What happens to common materials in the vicinities of a nuclear accident where neighborhoods have to be evacuated, decontaminated, cleaned ? Is it like a -say house- got 'sprayed' with what?; the wind brought what and deposited it where? towards it -or the wind has no effect like in electromagnetic radio waves, not carried/deflected by wind- ? The decontamination being obviously more extensive near the initial accident site, how deep does it reach ? Is it skin deep as if paint would be scraped off, it would produce a considerable improvement, or is it deep into concrete, wood structures, soil, plants, trees, water in creeks ? What is the change experienced by those common irradiated materials and the emissions they produce towards everything else ? Any good analogies explaining it are also welcome.
  14. Yes, grafting to a root, but for large limbs and roots; or promoting rooting to large mature branches that could bear fruit in much less time. After a trunk is harvested as timber, the point is to put back to use/growth all that is left unwanted. Is there any technologies achieving such ?
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