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The Coffee Shop

  • Thread starter The Fallen Angel
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Loxuru said:
Do complex numbers exist in the real world?
Well, you need them to describe alternating current, so...
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And to solve x**2 +1 = 0. I think Electromagnetism is much harder without them (certainly proving trigonometry relations like cos(2w) = (cosw)(cosw) - (sinw)(sinw) is. But to get a usable answer to a physical problem, you do have to take only the real part or the absolute value. It has always interested me that our brains can come up with mathematics that we can't put a number on (like pi) and use to measure things in the real world.
 
Frank Petrexa said:
And to solve x**2 +1 = 0. I think Electromagnetism is much harder without them (certainly proving trigonometry relations like cos(2w) = (cosw)(cosw) - (sinw)(sinw) is. But to get a usable answer to a physical problem, you do have to take only the real part or the absolute value. It has always interested me that our brains can come up with mathematics that we can't put a number on (like pi) and use to measure things in the real world.
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Even more enigmatic : these numbers ARE the real world, and they are so weird, because, like you said :
Frank Petrexa said:
at an atomic level, there are no circles or spheres--all the fields are "bumpy"
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So, the numbers are 'bumpy' too? Does Heisenberg's Uncertainty Principle leaves us stuck with endless numbers, so we can never describe the real world without numbers that have no ending?
 
JudithJesus said:
FB_IMG_1647646447102.jpg
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It’s what he would have wanted. :rolleyes:
 
Euronews just reported that in Russia Facebook and Instagram are now banned as internet platforms run by terrorists???
 
I have decide that looking at images of crucified naked persons,no longer interests me,so therefore have decided to give up my crux fantasy,and burn my crosses.
 
Baracus said:
I have decide that looking at images of crucified naked persons,no longer interests me,so therefore have decided to give up my crux fantasy,and burn my crosses.
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That's really sad, Baracus! Can't you bring your crosses to the recycling park? There is usually a container for discarded crrosses! That's much better for the environment than burning them!:angel2:;)

PS : mind to untie yourself from the cross, before you dispose it into the container!:facepalm::doh::doh::D
 
Baracus said:
I have decide that looking at images of crucified naked persons,no longer interests me,so therefore have decided to give up my crux fantasy,and burn my crosses.
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Thing is, these days it's hard to come up with a good April Fool, almost anything can happen in today's world. Most of the ones I saw in the press were less outrageous than their normal news!

Frank Petrexa said:
Not all that big, but potent.
View attachment 1140979

Annie, from the Taronga Zoo in Sydney, has a mellower disposition.
View attachment 1140980
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Sadly the platypus is disappearing from areas it was once numerous, see recent article below and WWF page


 
phlebas said:
Thing is, these days it's hard to come up with a good April Fool, almost anything can happen in today's world. Most of the ones I saw in the press were less outrageous than their normal news!



Sadly the platypus is disappearing from areas it was once numerous, see recent article below and WWF page


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For a long time, Australia wouldn't allow exports to foreign zoos (they also did this with the Tasmanian Devil when the facial cancer was threatening to wipe them out). San Diego Zoo Global now has two platypuses--and older male and a young female. I don't know if this animal has ever bred in captivity (they lay eggs--but then so do things like the Komodo Dragon and crocodiles, and they have been bred in captivity), but it takes a lot of knowledge to make this successful. Zoo staff have to be pretty skilled in a lot of ways. In a handful of cases (Arabian Oryx, Golden Lion Tamarin, California Condor) reintroduction has worked. But I fear that global warming is changing Australia, alternating between fire and flood, and not only the platypus is in trouble. (San Diego Zoo Global and the Los Angeles Zoo--where eucalyptus leaves can be grown in profusion--are the only two places in the United States that have breeding populations of koalas. With the koala disasters of the last few years, that is some reassurance anyway. San Diego rents some out--usually teenagers--to other US zoos for temporary exhibits in the summer: the browse has to be flown in. If one thinks churches are a strange business, zoos are just as complicated.)
 
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