Wednesday, February 22, 2017

What is LED switching power supply?

What is LED switching power supply? [on hold]

I was looking for 12v 30a switching power supplies (220ac to 12v DC converters) and both eBay and AliExpress bring me some LED Power Drivers, which are sometimes called "Switching power supply for Led Strip light"
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What are they?
How are they different from ordinary 12v voltage sources
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Can I buy and use such LED driver as an ordinary 12v power supply?

put on hold as off-topic by Marcus MüllerWesley LeeNick Alexeev Feb 19 at 21:56

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Thursday, February 16, 2017

Superposition principle: how additivity, linearity and orthogonality are related? [closed]

13 Мая Superposition principle: how additivity, linearity and orthogonality are related? [closed]

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Suppose I throw in a blue color into the water. It becomes blue. It then also throw some salt into it, it becomes salty. The color and taste seem to be additive. But they also seem to be orthogonal -- I can modify one property without affecting orthogonal contribution. Do additivity and orthogonality imply each other?
It looks like additivity acts in one space whereas orthogonality impacts independent axes. Can you unblur this situation especially after I read that QM is based on Hilbert spaces, whose idea is that all values on the same very axis are orthogonal? Probably, we can place all values of color and all taste components on a single axis and thus reduce orthogonality to linearity. Can we?
Aside from that, what is the superposition principle? I read the wikipedia article and I cannot distinguish it from linearity.
The brainless dick who closed the question told that it is a math question and has nothing to do with philosophy.

Monday, February 6, 2017

Can a plant evolve to give off CO2?

Animal bastards do not understand the organic chemistry and ban for exposing the misconception.

Can a plant evolve to give off CO2?

In my alternate history (1800s), I have troop hiking through tropical sub-Saharan Africa. For plot reasons, I have man-killing mosquitos, but I also have a plant that exudes CO2 and other attractants. These flowering plants are placed in the room at night to attract the mosquitos away from people.
Evolution-wise, however, 'consuming' CO2 and giving off O2 is so deeply ingrained in a plant's DNA, it is hardly believable to be the other way around.
I'd easily hand-wave it away as some special scent, but the CO2 is critical to the plot. Can a plant evolve to give off CO2? Or rather, how difficult would that be to explain.

Can a plant evolve to give off CO2?
Look at the definition of the plant. The plant is a creature that grows by H2O+CO2+lightCnHm+O2. The CnHm part, called biomasshydrocarbonsglucose or oil in plain English, is what constituates the body of the plant. The only way you can produce CO2 is to turn the reaction backwards. But, it will destroy the plant since the opposite reaction, CnHm+O2H2O+CO2+heat, is known as "burning" or "decay". This is what mushrooms and animals do: they decay the biomass and use the sun energy to move around.
That is, white can become black but it won't be white after that "transformation". Ok? Plant, which produces CO2 denies its "plant feature".
I also have a plant that exudes CO2 and other attractants. These flowering plants are placed in the room at night to attract the mosquitos away from people.
The "plants" that exhale CO2 are called "mushrooms" or "animals". Mosquitoes hunt for the latter, I suppose. You can easily use such animals as such "plants" to attract mosquitoes away from people (I am not sure why animals would be more attractive than human though).
Ok, diverting mascitos from human to animals may be a bad idea since maskitos will proliferate on the blood. You probably could have plants that grow up to certain size and then stop growing. They will accumulate CH during the day sunbath and release all the CO2+H2O they accumulated during the day at night. But you could just cut some plants and burn them at night by feeding to the animals and mushrooms, for instance.
Hope that now my point that plant that releases CO2 is nonsense is clear. You would write about this and literate other people (I guess that majority are as illiterate not to understand this basic fact of life) because it is really important for sustainability we are talking about when build our worlds. Being illiterate, we move into the false direction. That is a problem. We build the better world by having false notion of beauty.
Comments are not for extended discussion; this conversation has been moved to chat. Valentin, I know that it can be frustrating when you get a lot of criticism, but please don't respond rudely. As Lightness Races in Orbit said, the Be Nice policy must be adhered to at all times. – HDE 226868 Apr 8 '16 at 22:06 
If you gave some justification for why the responses to your answer were incorrect, as you claim they are, that's one thing. But you didn't. You only stated, time and time again, that those who disagreed with you were wrong. Your position would be taken more seriously if you actually supported it. The way to react to criticism - even if you think it's "nonsense" - is to explain why you're correct, not to simply get mad at the commenters and insult them. If you're right, then they'll realize that quickly once you give your rationale, and that will be that. – HDE 226868 Apr 9 '16 at 21:34