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Good day all. Tricky question... Is it properly focused ?

Hello all. In typical social sites conversations which I sometimes receive, saw a video/report of a mexican company recycling plastics into fuels; I think I saw it about a year ago and now again. Being in spanish, may not be of use providing a link which I do not know how to obtain. Title is "mexicanos convierten plastico en gasolina" At tiktok ; if you have access to their content. Company name is Petgas. Can be a dreamy future or not, your knowledge would be more entitled to analysis and opinions. Edited: added. found a simple version on youtube --->

A credit card reader scans a magnetic strip. A punched card as of 1970 IBM System 3 below needs an optical row of sensors reader. And possibly an stepper motor for motion.

Hi all. Television is bombarding advertisements for the sale of Viagra pills at $0.87 each. If it is to be believed; how sales of something that was ~$40 each is now paying for expensive commercials and still making a profit in the era of inflation ? If production of the chemical was $0.01 each pill, and the chain of sales takes the typical ten times every stage of handling it; how can be advertised at more intensity than the sales of automobiles with a $50k sticker each ?

Hello all. My back yard has dozens of unproductive young trees 2m to 3m tall that will be eradicated or cut them off at or below soil level to prepare and clear soil for proper gardening. Is there a season of the year when this is more convenient to do to prevent regrowth ?

Hello all. That vertical standing screen prevents sparking ambers (¿is that the word?) from burns reaching wood floors, carpets... Is there a proven 'eye' size that works best ? Does it work as a 'spark arrester' ? And for the heat part; can some screen 'eye' size impede the heat transmission, like a microwave oven does need to block the emission of microwaves ? If it does impede the heat from passing trough, the screen would heat up more and release the heat into the room air, right ?

Thanks. Linux only, where cannot save .odt as .pdf in the memory stick. It is the printer ignoring .odt formats. Edited... The printer manufacturer technical support finally showed up and told me on the phone there is no .odt support from memory stick, nor planning to fix it. Am fried done.

( How am unable to print the .odt ) The file saved in a thumb drive and plugged to the printer USB jack. Not recognized file Other formats do print. Correct. That is the point, the printer decides what to accept, not the compfuser. Also, cannot save the .odt as .pdf No option shown to do it.

Greetings. My Brother monochrome printer MFC-L5850DW does not recognize .odt files (from LibreOffice programs); refuses to print them. It works well with .txt ; .doc ; .jpg... and many others. Is there a way to enable/add a format to the printer ? Is that in a memory chip inside ?

Hi. The news reported three hostage israelis killed by 'friendly' fire by mistake. If they were hostages, how come were they not in captivity, found by israeli soldiers ? Do you know details ?

Thanks. No, stands alone. 10 to 270 degrees; 10 degrees/second; 30 seconds, no load (no torque). 20cm x 20cm x 20cm. No.

Thanks. Yes, a servo does work but strongly prefer something electronically simpler as geared motor with no circuitry as will have to work in corrosive hard-to-reach enclosure and no stepper motion but analog smooth.

Thanks, +3 I will aim then to just above threshold current and care on heat dissipation.

Hi all. Trying to find in the market a motorized mechanism that sweeps an angle of chosen magnitude; can be even a toy or toy part. There has to be something available. Ideas please ? Wheel W turns pushing and pulling a link L that moves forth and back a part continuosly sweeping an angle A. + are pivots. Varying radius R changes the angle A swept. There may be dozens of different approaches, sketches to produce the same.

Greetings. When a LED specifications shows a 30 milliamperes maximum current and is driven to a third as 10 mA or even less, the life expectancy is considerably extended and its behavior as a panel indicator is still fully useable. Is a laser diode with a maximum current specified as 30mA also perform as a beam emitter at a third of the current (10ma) or less; or lasing is impaired and there is a minimum current needed ? What is the term specified for the current that starts to produce lasing ? If a laser diode is needed in operation 365 days non-stop; would underpowering it extend its life equally as happens with a LED ? What type of visible light laser construction could last emitting a beam for not less than a year ?

Greetings. Looking at a city map, showing typical streets and intersections... They are not always aligned east-west or north-south. How to find their heading ? Is there any tricky right click-alt-ctrl ??? to draw a line along the desired path and get a reading ? Example: Is that 'Johnson street' N25E ? or what is its orientation ?

Did not know it existed, never heard before. And always preferred the original versions. Until this one : ---> https://www.youtube.com/watch?v=OCNIrP3UHz4 Enjoy.

What is this ? A marketing joke, an illusion, a trick ? How does it work, if works at all ? ---> https://www.goodhousekeeping.com/home-products/g27471828/best-cooling-blankets/ and at many other sites

Clearly foggy. So the image at post #1 can be any root that received a 'feral' or 'ancestral' grafting. Or can be a natural never-grafted grown up germinated from a forest unattended tree, or rooted twigs from an undefined backyard tree, or can be whatever the seller thinks correspond to the name 'heirloom' . +1

Hi. From what I learned; sowing a seed from a fruit does not imply the new tree will yield an equal 'quality' fruit as the parent produced. I think the trees that grow from dropped seeds/fruit naturally germinated in the forests fit the same process as above. Is that called 'heirloom' ? Does it mean the naturally germinated trees = heirloom would likely be hundreds of varieties deviating from the parent ? Does it happen on all plants -say beans, onions, strawberries- or is it restricted to some clade/family/genus...? Will fruits from these be all equal or same as their parent if all seeds came from same single fruit?

Hi. Metallic wares will be safe for food use after visiting an oven at 200C+. Then boiling water poured in wooden/plastic wares for a while should produce same results. Discard whatever makes you feel uncomfortable. Nothing survives in plain gasoline either, with no need for a match... Odor would take several days to fade.

Thanks. Would the ratio of pistons give me that ? Assuming 40 poundsfoot force as you mention, -if that is the typical operation force for a 1 foot long lever- (or torque?)... would the ratio of pistons also give me the force ? The pistons area ratios is 113.1 to 2419.2 = 1 : 21.4 Similar sized jacks seen on the web are rated 20 ton. If that means tonnes I do not know

Chinglish...

Hi. Have a biggish hydraulic jack with no markings. Looks like the image below. Its pumping rod diameter is 12mm, its piston is 55.5mm I do not know what is the typical operation pressure of these things, or the typical force-length-leverage applied to the lever that plunges its pumping rod. How do I calculate its rating ?

Greetings. From corn flour, or tapioca flour, or wheat flour... ; can you obtain their 3 respective starches ? How is it done ? I read "Flour contains high levels of starch, but starch does not contain any flour" OK, fine, no problem. Also read all starches are very simple and the same. Does it mean the starches 'extracted' from the different flours mentioned above are equal ?