Science desk | ||
---|---|---|
< December 31 | << Dec | January | Feb >> | January 2 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Hi all,
I have a little look around and the only mentions of this purported chemical seem to be quotations from Wikipedia.
Hmm.... would Carbon triple-bonds survive cooking temperature? And is Bispropenyl disulfide - despite all what you might see on the internet - pretty much fictional? Pete AU aka -- Shirt58 ( talk) 12:37, 1 January 2021 (UTC)
Or only the limited set of all-time single-station records that most weather stations of long recordkeeping have, just count them and sum worldwide, that's simpler than trying to estimate complicated things like what year the world hurricane speed record etc is most likely to fall.
A spherical cow model doesn't seem too hard if you used some simple "what's the highest sigma reached by year x if weather station starts 1900 and climate didn't change" model which has probably been made and statistically found the most likely year to break a record if each temperature was boosted by the y-value of a simple curve that fits the average land temperature curve in the IPCC scenario but a degree of global warming doesn't necessarily cause 1 degree of boost to the highest temperatures in a place and correlation with precip, cold records etc would be bad. And those would have more effect than heat records by (collectively) outnumbering them. Sagittarian Milky Way ( talk) 15:08, 1 January 2021 (UTC)
I can understand "volume", but I can't understand "pitch" term. How to understand pitch in sound subject? Rizosome ( talk) 15:22, 1 January 2021 (UTC)
Wiki articles are too technical for readers so I prefer reference desk to learn. Low Pitch means first key in piano? Rizosome ( talk) 18:31, 1 January 2021 (UTC)
A Basque woman recently performed this remarkable shout for me. She started with a loud, high tone and gradually descended to a low pitch."
So "low pitch" sounds like "low decibel" sound? Rizosome ( talk) 23:48, 1 January 2021 (UTC)
Dear Wikipedians:
Why are so much attention and effort being directed towards nuclear fusion when breeder reactors are already shown to work? I read a piece by Bernard Cohen which calculates that just the amount of uranium-238 alone (not counting thorium) is enough to power the world for as long as the sun is in a state to support life on earth.
172.97.139.62 ( talk) 23:57, 1 January 2021 (UTC)
The amount of available fuel is not currently a limiting quantity - there is little practical difference to a contemporary society between using uranium to run FBRs for a billion years or the same uranium to run LWRs for 10 million years. Moving beyond the issue of fuel, the breeder reactors really only have one thing going for them - the waste consists of isotopes with much shorter halflives than that of conventional nuclear reactors. But that is where the major advantages end. Breeder reactors currently require a greater capital investment than conventional reactors of similar output; they are more prone to accidents, which is a rather huge deal when it comes to nuclear; and it's theoretically possible to use a breeder reactor to generate fuel for nuclear weapons. It seems likely that the increased cost and accident risk may be a sort of self-reinforcing issue - i.e. that the existence of these issues may contribute to more conventional reactor designs receiving more attention and research moneys, causing the difference in cost and safety to persist regardless. Anyway, fusion power comes without concern for the kind of radiation leaks of either of these types of fission reactor, without the concern of massive quantities of radioactive waste, and without the concern of waste being turned into fission bombs. Someguy1221 ( talk) 11:29, 2 January 2021 (UTC)
Breeder reactors can be used to produce fissionables leading to nuclear proliferation, as alluded above. And fission reactors in general (except for some inefficient designs not used so far in powerplants) present a risk of meltdown accidents etc. One can debate whether that risk is overhyped, but it exists. Everyone knows what Chernobyl is. With fusion, the hard technical problem is to keep the reaction going at all, not to prevent it from going out of control. 2602:24A:DE47:BB20:50DE:F402:42A6:A17D ( talk) 08:28, 8 January 2021 (UTC)
Science desk | ||
---|---|---|
< December 31 | << Dec | January | Feb >> | January 2 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Hi all,
I have a little look around and the only mentions of this purported chemical seem to be quotations from Wikipedia.
Hmm.... would Carbon triple-bonds survive cooking temperature? And is Bispropenyl disulfide - despite all what you might see on the internet - pretty much fictional? Pete AU aka -- Shirt58 ( talk) 12:37, 1 January 2021 (UTC)
Or only the limited set of all-time single-station records that most weather stations of long recordkeeping have, just count them and sum worldwide, that's simpler than trying to estimate complicated things like what year the world hurricane speed record etc is most likely to fall.
A spherical cow model doesn't seem too hard if you used some simple "what's the highest sigma reached by year x if weather station starts 1900 and climate didn't change" model which has probably been made and statistically found the most likely year to break a record if each temperature was boosted by the y-value of a simple curve that fits the average land temperature curve in the IPCC scenario but a degree of global warming doesn't necessarily cause 1 degree of boost to the highest temperatures in a place and correlation with precip, cold records etc would be bad. And those would have more effect than heat records by (collectively) outnumbering them. Sagittarian Milky Way ( talk) 15:08, 1 January 2021 (UTC)
I can understand "volume", but I can't understand "pitch" term. How to understand pitch in sound subject? Rizosome ( talk) 15:22, 1 January 2021 (UTC)
Wiki articles are too technical for readers so I prefer reference desk to learn. Low Pitch means first key in piano? Rizosome ( talk) 18:31, 1 January 2021 (UTC)
A Basque woman recently performed this remarkable shout for me. She started with a loud, high tone and gradually descended to a low pitch."
So "low pitch" sounds like "low decibel" sound? Rizosome ( talk) 23:48, 1 January 2021 (UTC)
Dear Wikipedians:
Why are so much attention and effort being directed towards nuclear fusion when breeder reactors are already shown to work? I read a piece by Bernard Cohen which calculates that just the amount of uranium-238 alone (not counting thorium) is enough to power the world for as long as the sun is in a state to support life on earth.
172.97.139.62 ( talk) 23:57, 1 January 2021 (UTC)
The amount of available fuel is not currently a limiting quantity - there is little practical difference to a contemporary society between using uranium to run FBRs for a billion years or the same uranium to run LWRs for 10 million years. Moving beyond the issue of fuel, the breeder reactors really only have one thing going for them - the waste consists of isotopes with much shorter halflives than that of conventional nuclear reactors. But that is where the major advantages end. Breeder reactors currently require a greater capital investment than conventional reactors of similar output; they are more prone to accidents, which is a rather huge deal when it comes to nuclear; and it's theoretically possible to use a breeder reactor to generate fuel for nuclear weapons. It seems likely that the increased cost and accident risk may be a sort of self-reinforcing issue - i.e. that the existence of these issues may contribute to more conventional reactor designs receiving more attention and research moneys, causing the difference in cost and safety to persist regardless. Anyway, fusion power comes without concern for the kind of radiation leaks of either of these types of fission reactor, without the concern of massive quantities of radioactive waste, and without the concern of waste being turned into fission bombs. Someguy1221 ( talk) 11:29, 2 January 2021 (UTC)
Breeder reactors can be used to produce fissionables leading to nuclear proliferation, as alluded above. And fission reactors in general (except for some inefficient designs not used so far in powerplants) present a risk of meltdown accidents etc. One can debate whether that risk is overhyped, but it exists. Everyone knows what Chernobyl is. With fusion, the hard technical problem is to keep the reaction going at all, not to prevent it from going out of control. 2602:24A:DE47:BB20:50DE:F402:42A6:A17D ( talk) 08:28, 8 January 2021 (UTC)