Endy0816
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Posts posted by Endy0816
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I would probably agree that it gets you to think about numbers more.
I have a suanpan(2 top beads, 5 bottom beads), but think the soroban(1:4) would be easier to work with. More videos available and fewer extraneous beads to deal with.
There are ones with a bar to reset the top beads all at once, which would be nice to have, but wouldn't be a dealbreaker.
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You don't have any more extreme dreams?
World enders, bizzaro trips, etc?
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Cooling a large volume down to such low temperatures would be extremely difficult in a home setting.
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On 1/29/2021 at 10:52 PM, MigL said:
Then why do you keep comparing them ?
( sorry, couldn't resist that )Interesting that none of you Americans can wear masks.
AOC isn't wearing one, and MTG isn't wearing it properly.
( also, what's with the presumptuous 3 initials )Pre-covid and Twitter handle length restrictions? Just her first name and last names really.
Wait until CaptCanuk97 is on the ballot lol.
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2 hours ago, MigL said:
Umm, windows are one thing, Zap.
Would you feel better if you were one of the 5 killed at the Capital, or on of the 18 killed during the BLM protests?
2-3 of those 5 weren't actually killings.I think I think if you read up on the more casual police brutality you'd understand where they're coming from. terms of the actual protests there were please National Guard random federal officers and counter-protesters all mixed in.
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1 hour ago, MigL said:
Yes. Where my ( or those I care about ) life and liberty is threatened; otherwise, no.
The problem is by that point it can be too late. The cop 'thought his life was in danger' as you reached for your passport or if lucky you are locked up a few years for being in the vague vicinity of someone they were looking for.
1 hour ago, MigL said:No, you have groups 'protesting' against 'blacks being killed for no reason', by hurting innocent people, destroying property, and taking over cities.
I think I have made my stance against any kind of violent protests well known on this forum.
Everyone has the right to protest, but that right ends when it starts infringing on the rights of others.I would normally agree, but in this case the underlying causes were again ignored until once more riots broke out. At some point have to ask what it will take to break the cycle.
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5 hours ago, MigL said:
Not to worry Zap, friends should be able to talk about this sort of stuff.
Well, you're willing to excuse violence perpetrated in the BLM protests, because those protesters feel they are being discriminated against by Police/Justice System.
When did violence gain a case sensitive meaning ?
Violence IS violence.
Whether there is an equivalence ( or not ), is immaterial.
Is there any case where you would consider employing violence against the State justified?
You have blacks being killed for no reason in their own homes by the 'lawful authorities' on the one hand and a group wanting to overturn a democratic election and hang a fellow conservative on the other.
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20 hours ago, studiot said:
Every degree above the optimal represents wasted heat and possibly dangerous conditions.
Do you like being suddenly scalded in the shower ?
Sorry, maybe should have been more clear but you need lower temperatures in general.
You want to go from a gas back to a liquid. You need the return line at a cool enough temperature for that.
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3 hours ago, studiot said:
I think it is rather more complicated than that.
The lower the input temperature the more heat you need to raise the water to the fixed output temperature.
It also need to be considered whether the boiler is running in DHW or CH mode.
But it is good to discuss these things to gain understanding.
Think ideally your output temperature should vary based on heating load. If return temperature isn't low enough you won't be able to steal back the latent heat locked away. Does take the correct setup to really see the benefits.
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1 hour ago, MigL said:
What happens at the far left of that graph, when the inlet water temperature drops to 00 C ?
You would have a nasty discontinuity ?Literally, as ice will start forming lol.
5 hours ago, studiot said:In particular your graph show boiler 'efficiency' falling dramatically with rising water inlet temperature, which begs the question of what is meant by efficiency?
The lower the inlet temperature, the more heat can be recovered via phase change.
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1 hour ago, Marcus Vinicius said:
Reproductive cloning is a method in which the DNA of an egg in an organism (A) is derived and, subsequently, the DNA of a somatic cell in an organism (B) is placed in the egg. After that, a new organism (C) with the same genome as (B) will be created. What do you think of this technique?
Me: I would like to have a clone of myself. But I think it is bad for humanity in general, because if everyone starts to clone themselves, we would no longer have genetic variability, and that could cause several weaknesses of diseases for example.
Depends on to what extent it is used and how the population is distributed. Cloning offers a route to rapid population growth/recovery.
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They had a couple of different systems they turned to.
QuoteLarge numbers
During the centuries that Roman numerals remained the standard way of writing numbers throughout Europe, there were various extensions to the system designed to indicate larger numbers, none of which were ever standardised.
Apostrophus
One of these was the apostrophus,[46] in which 500 was written as IↃ, while 1,000 was written as CIↃ.[20] This is a system of encasing numbers to denote thousands (imagine the Cs and Ↄs as parentheses), which has its origins in Etruscan numeral usage. The IↃ and CIↃ used to represent 500 and 1,000 most likely preceded, and subsequently influenced, the adoption of "D" and "M" in conventional Roman numerals.
In this system, an extra Ↄ denoted 500, and multiple extra Ↄs are used to denote 5,000, 50,000, etc. For example:
Base number CIↃ = 1,000 CCIↃↃ = 10,000 CCCIↃↃↃ = 100,000 1 extra Ↄ IↃ = 500 CIↃↃ = 1,500 CCIↃↃↃ = 10,500 CCCIↃↃↃↃ = 100,500 2 extra Ↄs IↃↃ = 5,000 CCIↃↃↃↃ = 15,000 CCCIↃↃↃↃↃ = 105,000 3 extra Ↄs IↃↃↃ = 50,000 CCCIↃↃↃↃↃↃ = 150,000 
Page from a 16th-century manual, showing a mixture of apostrophus and vinculum numbers (see in particular the ways of writing 10,000).Sometimes CIↃ was reduced to ↀ for 1,000. John Wallis is often credited for introducing the symbol for infinity (modern ∞), and one conjecture is that he based it on this usage, since 1,000 was hyperbolically used to represent very large numbers. Similarly, IↃↃ for 5,000 was reduced to ↁ; CCIↃↃ for 10,000 to ↂ; IↃↃↃ for 50,000 to ↇ; and CCCIↃↃↃ for 100,000 to ↈ. [47]
Vinculum
Another system was the vinculum, in which conventional Roman numerals were multiplied by 1,000 by adding a "bar" or "overline".[47] It was a common alternative to the apostrophic ↀ during the Imperial era: both systems were in simultaneous use around the Roman world (M for '1000' was not in use until the Medieval period).[48] [49] The use of vinculum for multiples of 1,000 can be observed, for example, on the milestones erected by Roman soldiers along the Antonine Wall in the mid-2nd century AD.[50] There is some scope for confusion when an overline is meant to denote multiples of 1,000, and when not. The Greeks and Romans often overlined letters acting as numerals to highlight them from the general body of the text, without any numerical significance. This stylistic convention was, for example, also in use in the inscriptions of the Antonine Wall,[51] and the reader is required to decipher the intended meaning of the overline from the context. The vinculum for marking 1,000s continued in use in the Middle Ages, though it became known more commonly as titulus.[52]
Some modern sources describe Vinculum as if it were a part of the current "standard":[53] however this is purely hypothetical - since no common modern usage requires numbers larger than the current year (MMXXI). Nonetheless, for reference: here are some examples, to give an idea of how it might be used::
- IV = 4,000
- IVDCXXVII = 4,627
- XXV = 25,000
- XXVCDLIX = 25,459
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On 1/6/2021 at 11:28 PM, npts2020 said:
How, then, does a nuclear powered aircraft carrier go from all stop to full speed ahead in a short period of time?
At least with a Sub I'd say it's fairly sluggish about accelerating. You can't demand too much from your steam or reactor in too short a time.
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6 hours ago, studiot said:
Should car manufacturers blame road design and construction or themselves if their technology fails to account for all road types ?
To some extent everything can be fooled by optical illusions, though one could make the case that adequate testing is needed to ensure a reasonable level of performance.
Not sure who or what should determine that level though.
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1 hour ago, Olorin said:
The hole in the ozone layer is, for starters, in the wrong hemisphere. Population, industry and land surface area testify to that. Chloroform Ch3Cl doesn't burn, Carbon Tetrachloride CCl4 was used as a fire extinguisher until people died when it formed phosgene gas COCl2 with hot iron, which gas was used in WWI to kill enemy troupes, but causing continuing problems much as agent orange has for veterans. Phosgene is still used to create insecticides and herbicides. Poison dart frog toxins are chlorofluorocarbons or CFC's. Carbon Tetrachloride was also discovered to cause instant fatal renal failure, while sold as dry cleaning fluid. The common factor in these deaths was alcohol in the blood of the victims, and it was banned.
The claim that the ozone layer is leached by CFC's, even supplying some supposed chemical equations, seems unlikely. Class actions may have been threatening, besides the inability of natural processes to remove them from the environment, where they concentrate up the food chain. Ozone is a powerful oxidising agent. The solar wind consists of protons and electrons and the protons head south. They are oxidised by ozone O3 and even by ordinary oxygen O2, creating water missing an electron. This discharges slowly, or by producing red meeting the discharging green electrons rising in aurora Australis, or as red sprites drawn by lightning strikes (electrons rising) and manifesting above storm clouds. Borealis is normally green as electrons descend to earth. Possibly the current here implied contributes to the earth's shifting magnetic field.
The atmosphere under the geomagnetic poles isn't as protected as the rest. CFC's were still ultimately causing the problem though.
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3 hours ago, studiot said:
Since neither of you are english, you may not be familiar with the english expression "Brute force and ignorance" as some method 'any fool (or monkey) could employ'.
Think makes more sense to evaluate based on the time and the resources each method takes.
You don't want to spend forever on something the computer can brute-force for you. Password cracking for example.
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On 12/23/2020 at 5:15 PM, swansont said:
A sail exerts a force from an external source (the wind)
This works by taking the emanations of the sun and pushing them back onto the sun.
I think it is supposed to count as it is itself using the sunlight to remain stationary.
Had a thought that you could shield the sun, bringing the heliosphere in and perhaps truly sail via the passing interstellar medium. I've never seen analysis for that one though.
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People, on average, earn more where it costs more to live. This doesn't necessarily mean they're any more industrious though.
In reality I think this would just reduce the available supply, rather than cut into the Airbnb or real-estate speculation culture.
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11 hours ago, bearnard44 said:
As far as you may know, scientists found a huge amount of water on Mars. I`ve been wondering for a while if that water is contaminated with radiation because of the high level of radiation on the red planet?
Probably is radioactive dust on/in the surface ice but underground water should be okay.
I'm thinking that as it is probably saltwater, we'll remove any contaminants at the same time as we are desalinating.
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Possibly supposed to show pressure equalizing. A pressure exchanger is a real thing although that doesn't seem a very good example.
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1 hour ago, RamaRaksha said:
The point of the post is that there is only one World - this one! No running away and hiding in some magic land in the sky. God is not a Sugar Daddy, He is not running a Retirement Home in the sky. So those vermin is YOU or your friends, buddy
They or I would then reincarnate. Is suffering not part of existence until reaching Nirvana?
Not sure about Hinduism, but there are realms in Buddhism that might be said to be what the Christian faith considers as Heaven and Hell. Perhaps Christianity is simply mistaken about their nature. Who can say?
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All my pets are expected to work defending the home from those reincarnated as vermin and must come running when called, no exceptions.
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20 hours ago, swansont said:
That’s basically the opposite of a sail.
How do you mean?
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9 hours ago, swansont said:
Where does the solar sail attach?
Be via gravity.
QuoteShkadov thruster (named after Dr. Leonid Shkadov who first proposed it), or a Class A stellar engine.[4] Such an engine is a stellar propulsion system, consisting of an enormous mirror/light sail—actually a massive type of solar statite large enough to classify as a megastructure—which would balance gravitational attraction towards and radiation pressure away from the star. Since the radiation pressure of the star would now be asymmetrical, i.e. more radiation is being emitted in one direction as compared to another, the 'excess' radiation pressure acts as net thrust, accelerating the star in the direction of the hovering statite. Such thrust and acceleration would be very slight, but such a system could be stable for millennia.
https://en.wikipedia.org/wiki/Stellar_engine#Class_A_(Shkadov_thruster)
9 hours ago, swansont said:Mass ejection just compounds the problem you are trying to solve.
The alternative Caplan thruster, would cost some of your hydrogen and mass, but you would be headed to 'fill-up' and need to lose some byproducts anyways(if the size is to be maintained).
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Static electric shock appears blue, but why?
in Physics
Posted
Comes from the Nitrogen mainly.
https://en.m.wikipedia.org/wiki/Ionized-air_glow
You have an... interesting.. idea of 'fun' lol. Kills me visiting relatives up North during the winter.