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John Cuthber

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Posts posted by John Cuthber


  1. 2 hours ago, IDoNotCare said:

    I don't understand why we are still talking pro currency pro politics pro free trade economy here 

     

    2 hours ago, IDoNotCare said:

    As Jim Morrison said, they got the guns but we got the numbers gonna win yeah we are taking over

    Are you volunteering to go up against the guns first?
    If not, you understand why we are still talking about money.

     

     

    2 hours ago, IDoNotCare said:

    Yet the only riots have been about skin pigment not anti class warfare

    It's quite close to being the same thing.


  2. I don't think it will be the end of the NRA, but maybe it will be the beginning of the end.

    It's not my field; are there any "competitor" organisation?
    If there was an organisation that could say "We are a bit like the NRA, but less corrupt",  they might do well enough to take over.


  3. 5 hours ago, drumbo said:

    So she just loses in a physical altercation 99.9% of the time?

    By shooting him.

    Did the bit about 

     

    9 hours ago, John Cuthber said:

    (His is already drawn before she knows that the man or the gun exist.)

    not display properly, or are you just acting like an idiot?
    Reputation of -33 in just 75 posts hints at one of those...


  4. 10 hours ago, drumbo said:

    How is a 110 pound women supposed to defend herself from a 200 pound man without a gun? Your stance is anti-woman.

    The same as everywhere in the civilised world.

    How is the woman meant to defend herself against a man who has a gun? (His is already drawn before she knows that the man or the gun exist.)

    What you have done there is rehash the "good (wo)man with a gun"  argument, and we already know it's simply not true.


  5. 3 hours ago, Strange said:

    Apparently, by making sure more people are armed so they can stop the shooter. Has that ever happened? Even once? Even when the school guards are armed? Do people with guns do better if armed robbers attempt to break into their homes? (I am fairly certain they are significantly more likely to be shot, themselves.)

    Occasionally, the police manage to shoot the right person. It's also not unheard of for a citizen to do so.
    In fact it happens something like once a day in the US.
    https://www.statista.com/statistics/251894/number-of-justifiable-homicides-in-the-us/

    On the other hand... 

    https://en.wikipedia.org/wiki/Gun_violence_in_the_United_States

    says there are roughly 40 times that many homicides where "the wrong person" gets shot.

    And there are about 70 times as many suicides as justifiable homicides. It's likely that, at least, some of those wouldn't  have died if it hadn't been for the ready availability of guns.

    Overall the stats show that the "typical gun on a home" is much more likely to be used to shoot a family member than a criminal.

    None of this influences gun supporters because they think those deaths happen to "other people".
    They don't recognise that the owners of the guns also thought exactly the same thing.

    But it would still be interesting to know what the NRA has been doing to address this.

     


     


  6. On 8/8/2020 at 4:31 AM, OldChemE said:

    I very much agree the leadership of the NRA should be held accountable for any provable acts along the lines of those charged.  As a gun owner, I want the Second Amendment to remain, but have long felt that the organizations that know gun technology best (Manufacturers and the NRA) should have been working with government to solve the problems instead of blindly fighting everything.  So-- I hope this lawsuit will lead to some positive results.

    I'm intrigued; in what ways have gun makers been seeking to solve the problems- say the problems of mass shootings in schools?


  7. The site  given in the OP is not science; it's not even "fringe science".

    It's technobabble, a gish gallop of sciency sounding words. 
    So there's nothing there to understand.
     

    If there's any scientific progress to be made on this topic, it's in the field of psychology explaining things like : "It's also weird that people reject science in one area or for one time period.. but accept all other areas of science. "
    Should this post be in the Psychology and Psychiatry section?

    Since Paroxysm's wish is to get a better understanding of physics my advice would be to look very nearly anywhere else on the internet apart from the page he cited.
    Even a page about collecting soft toys will be less misleading.
    I don't think we can hop to offer a useful grounding in physics via this page, but somewhere like the Khan academy can.
    I think it might be better to try to find strategies to overcome the sort of tosh  cited in the first post here.


  8. 12 hours ago, Arnav said:

    A cell of emf 12 v supplies a current of 400 mA to an appliance. After some time the current reduces to 320 mA and the appliance stops working. Find the resistance of the appliance, the terminal voltage of the battery when the appliance stops working, and the internal resistance of the cell.

    There is not enough information to answer that question.


  9. Polyethylene is essentially a long chain alkane.

    Polypropylene is a long chain alkane with a lot of methyl groups attached to it. 

    Polystyrene is similar, but with a lot of benzene rings stuck to the chain.


  10. 2 hours ago, swansont said:

    -40ºC = -40ºF

    0 K = 0 °R
     

     

    4 hours ago, Markus Hanke said:

    Here's another one - it is actually illegal to bring a Furbie into the Pentagon. It's in fact a criminal offence, punishable by lengthy prison sentences :)

    What charge? Bad spelling?


  11. 5 hours ago, Sensei said:

    medic has no beard. If you have longer beard and wear mask after 5 minutes you will have dizziness.

    One  known, documented problem with masks is that they don't work properly for people (like me, as it happens) who have beards- because the beard stops the mask sealing properly. So, if anything, they are less likely to reduce oxygenation.
    In the real world, I have a beard and I do sometimes wear a mask; I don't get dizzy..
    Again, your "point" is demonstrably false.


    Just stop trying to repeat this nonsense.

     

     

    5 hours ago, studiot said:

    Please, 

    The subject of this thread is mutations not masks.

    I take your point but, even if the thread was about flower arranging, it wouldn't be appropriate to let Sensei's dangerous nonsense stand uncorrected.


  12. 17 hours ago, Sensei said:

    Wearing masks on the face of such person even more decreases free access of Oxygen.

    Demonstrably false

     

    6 hours ago, Sensei said:

     

    "Losing consciousness" is not "symptom of coronavirus", as you, and link that you gave above suggests. It is result of wearing all day long masks (at work and way to work and back, in the all public places) which limits free access of Oxygen.

     

    Reported as dangerous misinformation



     


  13. 3 minutes ago, Drakes said:

    Well if you found it on the internet it must be real, right?

    Straw man

    3 minutes ago, Drakes said:

    LOL have you bought back issues that are available on the net for free?  

    No.
     

     

    4 minutes ago, Drakes said:

    Again I had this disease and

    Your experience is different from many people.


  14. They used to use crystalline quartz prisms- which makes life interesting because quartz is chiral. They had to make the prism out of two pieces o quartz, one left handed and the other  right.
    I think reflective diffraction gratings are common now.

     

    7 hours ago, ScienceNostalgia101 said:

    Would a diffraction grating work? I've long been interested in splitting sunlight into its UV and visible rays separately.

    Yes, but you might need some sort of "order sorting filter"



     


  15. On 7/14/2020 at 11:04 AM, swansont said:

    The referenced paper didn't say it was UV only, they said it was sunlight. That's where the 2 min comes from. If you have a reference for UV and intensity, by all means, provide it. Like I said, I’d like to see a study, rather than someone just whipping this up out of thin air.

    To be fair, we know that the effect of sunlight is almost entirely the effect of UV.
    Virus particles are essentially made of proteins and DNA or RNA.

    None of those absorbs visible light so viruses can't be affected by visible light. It won't even warm them up much since it will be scattered or reflected.

    So, you can discount the roughly 90% of sunlight that isn't UV*.
    Which makes the heating problem roughly 10 times less bad than you think.
    It's also likely that most of the "killing" is done by UVB rather than UVA, in which case you can include another factor of 20.
    In that case, the thermal load from the UV needed to get a good kill quickly is roughly the same as sunlight.

    Which is all very well, but a hair drier is probably easier.
     

    *

    Based on
    Most of the natural UV light people encounter comes from the sun. However, only about 10 percent of sunlight is UV, and only about one-third of this penetrates the atmosphere to reach the ground, according to the National Toxicology Program (NTP). Of the solar UV energy that reaches the equator, 95 percent is UVA and 5 percent is UVB. 

    From
    https://www.livescience.com/50326-what-is-ultraviolet-light.html#:~:text=However%2C only about 10 percent,and 5 percent is UVB.
     

     


  16. Imagine that, rather than rigid beads, these contained dots of nuclear material surrounded by a gas and then an elastic membrane. In that case, if the reactor got too hot the gas would expand and increase the distance between the dots. That would reduce the reaction rate and so the reactor would cool again.

    You can achieve the same sort of effect by having a reactor that relies on  heavy water as the moderator as well as the coolant. If it gets too hot the heavy water boils off.

    So it's sort of possible to make a reactor that can't overheat.

    But I don't see anything here that would achieve that  outcome. It might be there, but they didn't mention it.


     


  17. On 5/6/2020 at 10:45 PM, Enthalpy said:

    UV LED are available for near-ultraviolet

    Near UV isn't good at killing viruses.
    The big problem is that , even at the right wavelengths, a virus hidden under a fingerprint is immune.

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