Endy0816
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Posts posted by Endy0816
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7 hours ago, Killtech said:
Of course. What i meant is that the definition of the standard for clocks and rulers is itself a significant degree of freedom, as it does not affect any real physics itself. yet massively reshapes the resulting model.
Can always choose an alternative unit system.
As a physical constant, it simply makes sense to have redefined metric units in terms of it.
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Edited by Endy0816
1 hour ago, TheVat said:Yeah, seems to be a popular one in the UK. I've heard UK members at another science forum referring to it as such. To me it looks like a cross between a dumpster and a Transformer.
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In honor of the day....
https://theonion.com/pete-hegseth-calls-for-steep-cuts-to-number-of-steps-in-aa-recovery/
Saw where even the racoons confused it for a dumpster 😂
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7 hours ago, Linkey said:
There have been performed some studies which reveal that the Dem supporters rate the freedom of speech as very important less than the Rep supporters:
The Dem supporters now can even say "we have so many problems because of the Fox News channel, is spreads lies and propaganda, let's close it". And this forum illustrates this trend too:
It's the right to freedom of speech from Government interference and there are limits even then.
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On 11/4/2024 at 9:32 AM, Externet said:
U.S. presidential election dictated by the electoral votes. OK.
Why, how come, the democracy of an individual state differs its democracy from the United States democracy ? Each state elects their governor (State president with another name?) by popular vote instead of an electoral -county?- votes if the United States is united' ? 😦
It was one of many compromises.
Some wanted President chosen via a more Parliament style system, others wanted a popular vote.
United is meant more in the sense that the individual States each with their own Constitution and everything, are all in a Union together.
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7 hours ago, Genady said:
I mean, ONE third is different from TWO sixths.
Cuts each slice in two, takes 5 sixths of the pizza for services rendered.
I think of them in more algebraic terms. The numerator and denominator are together expressing a relationship, rather than being fully defined themselves.
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Yes, strictly speaking the popular vote doesn't count, except for as it applies to faithless electors in the electoral college. Law varies by State in regards
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Edited by Endy0816
2 hours ago, Airbrush said:After I discovered ChatGPT, I asked it a lot of questions, maybe 100, and it was interesting to see the answers, often in great detail, and most of it seems true. It's not perfect but can answer any simple question that has a generally accepted answer. Recently, ChatGPT stopped answering my questions. I know it cost to have unlimited access. I had a limit to how many questions I could ask in one day. But now days have gone by and ChatGPT continues to ignore me. Anyone know about ChatGPT?
Weird. I use it, haven't seen such issues.
Maybe try clearing the cache or refreshing the page?
They periodically role out new versions so that may have caused some trouble.
Would also try with another browser.
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Edited by Endy0816
6 hours ago, joigus said:Oh, I see. I was thinking more of short distances rather than longer ones, as Lorentz contraction makes the accelerated body shorter and shorter. But the OP, as well as other members have been talking about cosmological distances too, now that you mention it. I must confess I haven't figured out how both are related. It seems like some combination of length contraction and time dilation (contraction relative to the traveller relative to the observers tied to the planets?). What I fail to see is how one is supposed to use these effects to achieve interstellar space travel. It could be that OP is trying to combine effects happening in different frames... This happens often.
For person onboard the ship, the distance between them and their destination is also shortened due to length contraction.
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4 hours ago, Maartenn100 said:
According to Einstein's theory of special relativity, when traveling at speeds close to the speed of light, you experience a significant shortening of distances in the direction of your motion. This phenomenon is known as length contraction.
This means that any distance in the universe is reachable as long as we can travel close enough to the speed of light, because as v approaches c, γ\gamma becomes very large, and thus L becomes very small.
For an observer who is stationary relative to your motion (an "outsider"), your clock seems to run slower; this is called time dilation. But from your own perspective inside the spaceship, time proceeds normally, and it is the distance to your destination that becomes shorter.
This can be expressed using the following formulas from special relativity:
L = L₀ / γ
Where:
Lo is the rest length (the length measured in the reference frame where the object is at rest),
γ\gamma (gamma) is the Lorentz factor, defined as:
γ = 1 / √(1 - v² / c²)
v is the speed of the moving object,
c is the speed of light.
Time Dilation
The dilated time Δt measured by the stationary observer is given by:
Δt = γ * Δt₀
Where:
Δt₀ is the proper time (the time measured in the reference frame of the moving observer).
Explanation
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For you in the spaceship: The distance to your destination L is smaller than the rest distance L₀ due to length contraction. Time passes normally for you; you don't notice any difference in the flow of time in your own reference frame.
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For the outsider: Your clock seems to tick slower due to time dilation. The distance between the starting point and the destination remains L₀.
There is no length contraction in their reference frame.
These effects become significant at speeds that are a substantial fraction of the speed of light. They result from the way space and time are interwoven in the theory of relativity.
Conclusion
Any distance becomes reachable once you travel close to the speed of light.
Expansion of spacetime will limit things.
Anywhere can be arbitrarily close, but still remain out of reach.
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4 hours ago, npts2020 said:
Ok, so how much is price gouging? 10% more than normal? 50%? 200%? 1,000%? If I had the foresight and means to acquire something in short supply, who are you to tell me I am price gouging if people will pay it? It seems to me I should be congratulated for being a good enough capitalist to maximize my profits.
Law varies by State.
https://www.findlaw.com/consumer/consumer-transactions/price-gouging-laws-by-state.html
Governments generally come down hard on price gouging. Typically requires there to be a declared disaster to qualify though.
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2 hours ago, MigL said:
A lot of 'refugees' are not refugees.
They land at our airports, claim refugee status, and have no paperworks.
Begs the question ... How did they board the plane without paperwork ??Also there is no such thing as an economic refugee; all immigrants are seeking a better way of life, but that doesn't make them refugees.
An immigrant who seeks a better way of life is required to have a job waiting for him/her that has to be worked at for a period of time, or take college/university courses without a source of income.
Or you claim refugee status and the Government puts you and about 300 others in hotel rooms in Niagara Falls, with free health care, dental benefits and welfare benefits.
Most of the Indian young men I work with had to wait, on average, two years for the bureaucracy to allow their wives to join them here.Canada has plenty of land area, and little population. We want ( actually, need ) immigrants; why not make it easier for all who wish to come here legally ?
Could perhaps expand upon Canada's existing program for biometrics collection.Am guessing having the same problem as everyone of processing asylum requests. Will end up with an obvious problem if fewer are being processed than are arriving.
Really be better to restrict initial benefits than for governments to interfere with free market labor flows. Invisible Hand will always act to counter anything they attempt.
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On 7/21/2024 at 10:47 AM, TheVat said:
Somehow I had completely missed that. The media handling of that event was amusing...
https://en.wikipedia.org/wiki/Jimmy_Carter_rabbit_incident
Even the monkeys and alligators know better than to mess with a swamp rabbit.
Only giant anacondas are brave enough and even then only after the swamp rabbit dies.
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5 hours ago, kenny1999 said:
Sorry, I don't understand.
I mean, for example, there are two devices which are of the same model and brand, and I don't find any printed serial code, for example, two USB flash sticks which are of the same capacity and model, could there be anything inside the devices which make them different? When they are connected to a computer, is there any different value or parameter sent to or logged in the computer from two devices?
Different parameters are sent to the computer. It'll also be in a different physical port.
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43 minutes ago, Externet said:
Yesterday my farmer-background-style neighbor saw me watering plants with a bucket as my cistern was too low to siphon for irrigation, and told me to build the "container" sheeety pump. I asked him to build one for me and show me how it can work. Here I go again. Now it is trendy ? What is going on ? Doubt he will build one, but I will push him hard for it. And he says to do it with a bottle as 'container' 🙄
More of the same crap videos I do not understand... WTF? Export to speculations if deserved; but do not bring ram pumps to the mix, please.
May just be using an offscreen energy source to move water(vacuum/pump), with the barrel acting as a reservoir.
Do you have a wet/dry vac you could use?
If your cistern can be sealed, could alternatively force air inside and force water out that way.
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6 hours ago, Peterkin said:
That may be the future of space colonization - assuming** - but it does nothing to relieve the crowding and privation here on Earth. ** - that anyplace within reach can be terraformed; otherwise, why even bother? What's the point in taking 150,000 years to seed a plastic dome?
- that we had the resources to spare for such a huge frivolous gesture
Unless what you mean is a last gasp effort to save some remnant of humanity from extinction. There's been a lot of talk about that. But it's not what the OP is about.
Population density changes and resource distribution are understandable concerns, but the global population growth rate is actually reducing.
We're a pretty frivolous species. I'm expecting a slew of colonies founded by different entities for varying reasons.
Most colonies won't take long to construct once the infrastructure and automation is developed. Terraforming is probably a pipedream, but habitats could still offer plenty for people.
Extraterrestrial environments pose issues for developing embryos that artificial wombs could help us overcome. We're likely to see the technology used in a few different ways though.
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On 7/4/2024 at 3:09 PM, Peterkin said:
Which had nothing to do with the Wright brothers, who did nothing in rocketry. You'll have to credit the Sung Dynasty via Robert Goddard. But even the few people who can get to the moon can't survive there for very long. You can bet your fake cowboy boots the passengers won't be a babies their parents can't feed.
Majority of the resources necessary for a colony are available.
Likely be transported as gametes. Raising the first few generations would be interesting though. Possibly require robotic assistance depending on the numbers.
Lot will depend on our future capabilities and what we're trying to accomplish. Genetic bottlenecks and population growth may not even be an issue.
What is wrong with people immune system? They say 1 in 4 will get cancer in their life?
in Microbiology and Immunology
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Edited by Endy0816
Drive behind being multicellular breaks down as your cells' DNA and mDNA diverges.
Some of the DNA code is necessarily problematic, but all cells have a copy. Would either have to artificially regulate everything or eliminate as cancerous cells appear.