Landfills put out methane, for the same reason (anaerobic digestion). Small steam, electricity, or dual-purpose (co-generation) plants are often located near closed landfills to take advantage of the cheap energy source.
No, there are other components that go bad over time.
Also, in nukes, the short-lived component is the initiator, which is based on an alpha emitter with a half-life of a few months. They have to be changed out regularly.
Maybe they did pay attention, as the math classes I attended for a computer engineering degree weren't concerned with algorithmic efficiency. That came in the algorithms class (for non-numeric algorithms) or the numerics class.
However, I do agree there's a lot of slow code out there.
I wonder if smart high school students are turned off to science and engineering by the perception that workers in these fields are underpaid (relative to managers and lawyers), underfunded, and underappreciated by management?
When I was in high school, in the 1970s, an engineer came by in a three piece suit and told us if we wanted to be engineers, we needed to position ourselves for the transition to management, or lose our jobs to the next wave of cheap new grads.
Our modern climate represents a very short, warm period between glacial advances.
Obviously, we can look back in time to establish the glacial history (I used to cross the east-west ridge pushed up a few miles south of Lake Ontario, NY, by the last North American glacial advance every day, going to school). We can look at past interglacial periods and say they were long or short. But, with the increase in infrared-absorbtive gases in the atmosphere, and as-yet not fully understood feedbacks, claiming that this interglacial will be short is shaky, at best.
In 1982 I made 16K working for the US government in small-town southern California, which was low but sustainable (I paid my own way and even invested a bit).
In the chemistry of ozone depletion, an O-X bond is formed, where X is a halogen. Stratospheric UV breaks this bond for X = Cl or X = Br, allowing one atom halogen to destroy many ozone molecules (catalytic destruction). But, stratospheric UV can't break the O-F bond. So one F atom destroys one ozone molecule only.
Fifty percent of neutrons go to continuing the chain reaction (assume steady state). Some (most, maybe?) of the rest irradiate the shell, supports, and the coolant. Even if hydrogen accumulates, it needs some oxidizer to ignite it.
There are 2 reactors in operation, #2 and #3. #1 (aka Mt Fuji, because the top of the containment building is cone-shaped and sports some bird shit around the top that vaguely resembles snow) was defuelled and the reactor core encased in concrete and steel. There was a plan to move it by barge to a repository, but there is some hold-up in the process.
Know where that hydrogen came from? It came out of the interstices in the various metal components when the protons from the reaction had joined up with electrons to produce hydrogen.
Huh? Fission produces daughter nuclei and neutrons, not protons.
BTW my favorite lab class in an undergrad chemistry program was "Nuclear Chemistry," because it was so easy to get correct results from the neutron activation experiment.
Drumroll please, as we find out how old the moderators are
Unlikely, given (a) the near-constant re-run of "I Love Lucy;" and (b) the presence of a banner on the side of an office building in Hollywood, which is essentially a photorealistic rendition of the Vitameatavegemin episode.
Regarding the cost of books: some bookstores have a pretty generous return policy -- if they can resell it, and you bring it in with a receipt and before the time limit, you get a refund.
if he's smart enough he'll see fitting in as another intellectual challenge
Do the adults in his family promote socializing, or by words and examples do they promote social isolation? A favorite aunt saying "People are bad" will have an influence no amount of intellect can overcome.
I believe it's the application of this technique to biomolecules, as opposed to individual atoms. Something as big as a protein or peptide tends to be fragile, so I'd be curious as to how they do it.
I did experiments in grad school which condensed various organic molecules into small clusters via "supersonic expansion," but that only cools to 5 Kelvins or so. Putting more molecules into lower rovibronic states would make it easier to do experiments, as you have a better defined starting point.
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Landfills put out methane, for the same reason (anaerobic digestion). Small steam, electricity, or dual-purpose (co-generation) plants are often located near closed landfills to take advantage of the cheap energy source.
No, there are other components that go bad over time.
Also, in nukes, the short-lived component is the initiator, which is based on an alpha emitter with a half-life of a few months. They have to be changed out regularly.
Maybe they did pay attention, as the math classes I attended for a computer engineering degree weren't concerned with algorithmic efficiency. That came in the algorithms class (for non-numeric algorithms) or the numerics class.
However, I do agree there's a lot of slow code out there.
I forgot to add: vulnerable to layoffs.
I wonder if smart high school students are turned off to science and engineering by the perception that workers in these fields are underpaid (relative to managers and lawyers), underfunded, and underappreciated by management?
When I was in high school, in the 1970s, an engineer came by in a three piece suit and told us if we wanted to be engineers, we needed to position ourselves for the transition to management, or lose our jobs to the next wave of cheap new grads.
The story reminded me that Einstein and Szilard obtained patents on various thermoacoustic refrigerators.Is this a refinement of that?
Our modern climate represents a very short, warm period between glacial advances.
Obviously, we can look back in time to establish the glacial history (I used to cross the east-west ridge pushed up a few miles south of Lake Ontario, NY, by the last North American glacial advance every day, going to school). We can look at past interglacial periods and say they were long or short. But, with the increase in infrared-absorbtive gases in the atmosphere, and as-yet not fully understood feedbacks, claiming that this interglacial will be short is shaky, at best.
In 1982 I made 16K working for the US government in small-town southern California, which was low but sustainable (I paid my own way and even invested a bit).
In the chemistry of ozone depletion, an O-X bond is formed, where X is a halogen. Stratospheric UV breaks this bond for X = Cl or X = Br, allowing one atom halogen to destroy many ozone molecules (catalytic destruction). But, stratospheric UV can't break the O-F bond. So one F atom destroys one ozone molecule only.
Oh, I thought it was the new UCSD Pascal...
Around 27, in 1987 or so, working for the Navy; mostly for email, but I learned about Usenet then.
Fifty percent of neutrons go to continuing the chain reaction (assume steady state). Some (most, maybe?) of the rest irradiate the shell, supports, and the coolant. Even if hydrogen accumulates, it needs some oxidizer to ignite it.
There's a BIG difference between memorization and doing well on homework and exams, and creating knowledge!
There are 2 reactors in operation, #2 and #3. #1 (aka Mt Fuji, because the top of the containment building is cone-shaped and sports some bird shit around the top that vaguely resembles snow) was defuelled and the reactor core encased in concrete and steel. There was a plan to move it by barge to a repository, but there is some hold-up in the process.
Know where that hydrogen came from? It came out of the interstices in the various metal components when the protons from the reaction had joined up with electrons to produce hydrogen.
Huh? Fission produces daughter nuclei and neutrons, not protons.
BTW my favorite lab class in an undergrad chemistry program was "Nuclear Chemistry," because it was so easy to get correct results from the neutron activation experiment.
True, but IIRC, the dam does not depend on the arch. I've seen it listed as an "arch-gravity" dam.
The only computers in my old car are in the radio and FasTrack (toll bridge) transponder!
Drumroll please, as we find out how old the moderators are
Unlikely, given (a) the near-constant re-run of "I Love Lucy;" and (b) the presence of a banner on the side of an office building in Hollywood, which is essentially a photorealistic rendition of the Vitameatavegemin episode.
Agree 100%, and as an ex-OC'er I believe that intimidation of Latino voters occurs.
Regarding the cost of books: some bookstores have a pretty generous return policy -- if they can resell it, and you bring it in with a receipt and before the time limit, you get a refund.
if he's smart enough he'll see fitting in as another intellectual challenge
Do the adults in his family promote socializing, or by words and examples do they promote social isolation? A favorite aunt saying "People are bad" will have an influence no amount of intellect can overcome.
My bridge-playing friend tells me Bill Gates and Warren Buffet play competitively, and are referred to by other players as "$92 billion team"
Vote absentee to get a paper ballot. I do this in Alameda County, California.
I believe it's the application of this technique to biomolecules, as opposed to individual atoms. Something as big as a protein or peptide tends to be fragile, so I'd be curious as to how they do it.
I did experiments in grad school which condensed various organic molecules into small clusters via "supersonic expansion," but that only cools to 5 Kelvins or so. Putting more molecules into lower rovibronic states would make it easier to do experiments, as you have a better defined starting point.
Yes, but think of all the fundamental changes in Calculus that take place each year
... :)
Well, let's see, there was Dirac's bra-ket notation (makes quantum mechanics-related integrations MUCH easier to comprehend and do) and, uh, uh,
My undergrad calculus text was obsoleted at the end of the year by a 'new' edition (typo fix, new problems, new cover). Yuck.