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Everything posted by OldChemE

  1. Seems like it should be easy if you just set up the permutations in a spreadsheet and plug in the formula-- maybe I'll play with it later.
  2. The bottom line is that there is not astronomical significance. But-- if you want to count years, you need to start somewhere. Jan 1 as the beginning of the new year is an artifact of human history that is currently accepted by a large segment of human population. The rest of the universe doesn't care one way or the other.
  3. hey-- you asked for viewpoints and you got mine-- no harm. It really is your decision and nobody else's. The important thing is that you don't let it lead to a case of short-term gratification that leads to long-term regret. Only you can decide. Regardless of which way you go, good luck!
  4. There are many reasons to stay in High School-- that far outweigh the value of a GED. Admittedly, education in High school is sort of a 'shotgun' approach-- exposing you to many topics when some will have no importance in your future life. The catch to this is that the brain structure continues to evolve during the teen years, and many, many of us don't know what we will most want to do in our later life until we get there. Something which bores you today can likely end up being the foundation for something that, 5 years from now, will be important (this will be the point when you admit to yourself "Damn-- I should have finished High School"). Additionally, those who hire the really highly skilled people would like to see evidence that you are mentally strong enough to finish what you start-- even when it takes a long time (as many real-world problems do). Finishing High School is just one more proof that you can stick it out. If you cannot stick it out in High School, what makes you think you can stick it out in College? College degrees also require you to take courses outside your specialty-- and they can be equally boring. The GED is just a test of basic knowledge. It does not cover the wealth of added information and exposure to different fields of work that High School can provide you. That's why a High School diploma is valued higher than the GED.
  5. I found the "Pulling off a Nixon" comment interesting-- in how our minds rewrite history based on our conceived notions. Nixon did not extend the war-- see below (from history). Nixon was sworn in as President in January 1969 for his first term-- He immediately started reducing US involvement in the war. I was in the military at the time and was very happy to know I was unlikely to be sent to Vietnam. During Nixon's term as Vice President he spent time on missions to China. He understood that the Vietnam war was a bad idea. He lost his office for good reasons-- the the war was not one of them. The withdrawal was almost complete by the time of the 1972 election. History Channel-- timeline of the Vietnam war: • 1969-1972: The Nixon administration gradually reduces the number of U.S. forces in South Vietnam, placing more burden on the ground forces of South Vietnam’s ARVN as part of a strategy known as Vietnamization. U.S. troops in Vietnam were reduced from a peak of 549,000 in 1969 to 69,000 in 1972.
  6. You have two different metals in an acid bath--look that up in a chemistry book
  7. It can be done-- but it seems sufficiently rare as to be insignificant. I say it can be done because in one recent election I simply showed the poll worker that I had my sample ballot in my hand and they handed me a voter card-- never checked my name or had me sign anything. I suspect this was a moment of carelessness, not a normal practice.
  8. Air is roughly 80% Nitrogen already-- so even if you filled one tire entirely with air, the difference is only 100% vs 80%. Also, Nitrogen and Oxygen have similar properties. I haven't done the math but suspect the difference between 80% nitrogen and 100% nitrogen is trivial from a pressure standpoint. Maybe someone who has the numbers will weigh in on this (and correct me if I'm wrong).
  9. Explaining something in simple terms takes more than knowledge-- it is an art. I've known some brilliant people who knew their subject so completely that the many qualifications and exceptions made it impossible for them to explain things in a simple fashion. Being able to simplify without leaving out key concepts is difficult.
  10. Essentially, what you are proposing is a huge boat that you would allow to fill with rain water. Once it fills beyond a certain point, (determined by buoyancy) it will sink-- unless it is supported from below. The feasibility of that support will depend on the depth and/or technology used to support it (pontoons or equivalent). I don't really know-- but I suspect the cost would far outweigh the cost of simpler solutions such as desalinization.
  11. Regardless of the politics and debates, there is at least one practical reason why a civil war is unlikely in the US: territorial boundaries. For a civil war to be practical you need large areas under the control of one idealogy that have a boundary with those of another. Here we have cities that trend toward liberal views surrounded by urban area with more conservative views. That's not a very practical situation for civil war.
  12. Depends on how small you mean by miniature. The reactor in the research submarine NR-1 is about 6 ft in diameter and not a lot taller. But then you need the control rod drives, recirc pumps and, of course, some way to use the power (traditionally a heat exchanger and steam turbine).
  13. Yes Ghideon-- I didn't think of that.
  14. I'm somewhat sympathetic to the OP. When I taught high school physics it always bothered me that the SI units-- while inherently easy to use, were clouded by the naming-- which made it more difficult for the students to grasp their significance. We confuse the students with Newtons when we mean kg-m/second squared, Joules when we mean kg meters squared per second squared. This makes the learning process more difficult when we are faced with a problem where the inputs are in basic units like kg, m , s. Yes, it can be learned, but it makes in inherently clean system of units cloudy.
  15. You can get much more of an appreciation (good or bad) of the taste by drinking beer at room temperature. Chilling tends to hide some of the flavor. As for Guinness-- definitely a good one. slightly off topic: In 1977 or so I was at a outdoor party in Switzerland with a lot of British, American and other mostly English speakers celebrating the Queen's Jubilee. The beer booth consisted of a stand in the soccer filed with all the beer sitting in cases on the grass (not chilled). The man selling the beer was English. So, when he asked me what I wanted I said "any good English beer." At that point an Irish voice came from over my shoulder: "There isn't any! Have a Guinness." I later learned there are many excellent English Brews-- but that day it was Guinness.
  16. 13, not 2-- the sums of odd numbers are along the lines, so the center number should be the sums of the diagonally opposite odd numbers. In both diagonal directions the odd numbers are 9, 3 and 1 which add to 13. That is the odd numbers in 613 add to the odds in 492, and the odds in 389 add to the odds in 841.
  17. Most all beer is wonderful. To really enjoy the spectrum you need to compare. Years ago I lived in Switzerland and traveled in Europe quite a bit. While my family collected souveniers I collected local beer (never took any home). Every little town we stopped in I would have beer with my lunch. I would always ask our server if there was a popular local beer-- and if so I would order that one. The only beer I ever found that was a little unsettling was in a fishing village in Norway. The local fisherman's favorite was distinctly fishy tasting. In the town we lived in there was a local brewery that would deliver three cases of beer to me whenever I ordered: 1 case of Sternbrau, one case of Drei Konigs, and one case of Hexenbrau (in order, pale, dark, and strongly dark-- higher alcohol content). I kept the cases un-refrigerated in the garage and would pick one out each day when I got home from work. Beer heaven!
  18. If you take a narrow view-- as in which field of engineering designs which products, there could be an excess in some fields now and then. However, one of the value-added aspects of engineering is that you learn to approach problems and find solutions. It can demand considerable creativity. The engineers with creativity and the necessary education in the science and math needed to apply the creativity are very rarely without well-paying and fun work. Of course, Engineering is not the only field that benefits from creativity-- but its creativity coupled with knowledge of science and math that makes fields like engineering stay in demand.
  19. Also matrix solutions lend themselves readily to computerized solution systems. Being a math teacher, however, I'm more comfortable with non-matrix approaches.
  20. I think it has a lot to do with the times we live in. People don't mildly disagree any more. Just like in politics-- there is no middle ground. So instead of someone wondering whether it it OK for you to drink coffee while driving (which I also do regularly) they go overboard and become incensed over a trifle.
  21. Note the words "entire sequence of the pi number." This demonstrates the statement is false, since the Bible is finite and the number of digits in pi is not.
  22. Don't confuse money with currency. Sounds silly-- but to give you an example, my income and expenses balance out at around $5000 per month-- but I only take about $40 per week of that in actual currency (cash). The rest is all electronic deposits and debits-- no cash ever changes hands. Thus, the supply of currency does not have to match the amount of money present in a community.
  23. Depends on what you mean by 'rational.' One reason for religion: as children, we depend on our parents for guidance and protection, to feed us, care for us and shield us from the hard parts of life. Some people never get over that need for someone above them to provide that care and guidance-- so they turn to religion. Personally, I don't see the need, but I believe there are those who do.
  24. it's also worth noting that Amazon fills a niche that many stores don't. In our small town we have three grocery stores, one hardware, one ranch store, and three auto parts stores, and a number of tiny specialty stores. The small stores cannot viably carry a large inventory of less used items. There's just lots of stuff that we can only get by dealing with an internet connected supplier, such as Amazon. I gladly go to the local stores when I can quickly get what I want, but do a lot of online shopping for the rest.
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