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About OldChemE

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  • Birthday 07/13/1946

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  • Location
    High desert Nevada USA
  • Interests
    All things science, golf, tutoring grandchildren, developing cartridge designs for old rifles (experimenting with various types of gun powder, various bullet designs, various ballistic results, target shooting), working with my hands (wood/metal).
  • College Major/Degree
    BsChe, MSNuclear
  • Favorite Area of Science
    Physical Sciences
  • Biography
    38 years engineering, 10 years teaching (Math & Science) I'm not much of a debate person. I have confidence in myself (worts and all) so I tend to state my position on a topic and move on. Peer approval isn't high on my needs list.
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  1. The amount of matter in a sphere is only proportional to the cube of the radius if the sphere is of uniform density. It is the volume that is proportional to the cube of the radius. If the density if not uniform, the relationship is totally case-dependent. Either way is says nothing about a "preferred location." We don't have to be where the planet is if we are someplace else-- such as in orbit.
  2. OldChemE

    Do most humans need to believe in God

    Early man was essentially powerless in nature. He could hunt and forage for food, build shelter and care for a family, but he and his family were largely at the mercy of the natural elements. Having the intelligence to be dissatisfied with this situation, man began to wish for something better and to visualize beings who had power over the elements and did not have human limitations. This is the origin of Gods. Thus, early gods tended to reflect the needs of mankind: Gods of the hunt, the harvest, and of all things good in life. As mankind grew and developed into larger tribes and had territorial conflicts, the Gods of battle and war emerged-- because a warrior who could win was what mankind needed. As man recognized the limitations if death and yearned for more life, gods became immortal. When civilizations developed and mankind had a better lot in life, such as early Grecian and Roman societies, mankind yearned for pleasures that the moral standards of society tended to limit, and the immortal gods emerged that had to power to have limitless love affairs and debauchery. In simple terms, our Gods have always tended to represent the things we wish we could have in life but cannot always have due to our human limitations.
  3. OldChemE

    Meat and Vegetables

    Omnivore for sure. I love veggies and meat. I try not to eat meat from any animal with an encephalization quotient over about 1.
  4. Agreed. over a very short distance two great circles could appear to be parallel, but still ultimately converge.
  5. I'm not certain-- but I try. The internet makes it possible for people to say things and be aggressive in ways that they would probably never do in face-to-face conversations. I try to avoid this and behave in the same manner I would in conversations with friends. Civility is important to me.
  6. Whether or not parallel line converge on a sphere depends on how you define parallel. If you define parallel classically, as two lines of which corresponding points remain equidistant (such as latitude lines on earth maps), then they also do not converge on the surface of a sphere. Lines of longitude (again speaking in terms of maps) might appear to be parallel on some maps, but they are 'great circles' and are not parallel.
  7. OldChemE

    What Love Is

    There is nothing inherently "unclean" about sex as an expression of love-- sex is simply one valuable facet of a successfully intimate relationship.
  8. The title question and the discussion seem to be at odds. Parallel lines (the title question) being massless creations of geometry do not converge-- ever. The only exception is in art, where an artificial convergence point is selected for parallel lines in order to create the illusion of perspective. But, in fact the parallel lines do not converge. Beams of light, on the other hand, being subject to gravity, would presumably converge at some point (assuming they started out parallel but close enough for the very small gravitational effect to bring them together). The problem is proving this by experiment-- for all the reasons given above.
  9. OldChemE

    OK-- I'm baffled

    I appreciate the responses-- but I don't think the question has been answered. If x = 1 and y = 3 then the GCF of x2y2 becomes 9, which does not satisfy the constraints of the problem. If x = 3, then the GCF of both terms becomes 81, which does not satisfy the constraints of the problem. If x = square root of 3, then the GCF constraint is satisfied, but x then is not a positive integer, which violates the other constraint of the problem. I'm still trying to understand how both constraints of the problem (x and y both positive integers, and the GCF of both terms = 27) can be satisfied with the available answers.
  10. OldChemE

    Fluorine vs hydrogen

    The arrangement of elements in the periodic table was done before we had extensive knowledge of electron orbitals and all that. The original(s) of the periodic table were based on atomic weights and the reactive properties of the elements, not their electron structures. The Halogens all have nearly complete outer electron shells (missing only one electron), and are rather aggressive about stealing an electron to fill that outer shell. Thus, they tend to form ions with a -1 charge. That led to the classification called halogens. Technically, Hydrogen is also just 1 electron away from filling its outer (and only) electron shell, but Hydrogen usually (but not always) gives up one electron forming a +1 ion instead of stealing a second electron-- a behavior more like lithium, sodium and the others in its group.
  11. OldChemE

    OK-- I'm baffled

    In my spare time I work as a substitute teacher. In High School math today, students were working on a standardized practice test to prepare for the ACT exam. The following question baffled me. Given x and y are positive integers, such that both x2Y2 and xy3 have a greatest common factor (GCF) of 27, which of the following could be a value of y? The available answers are 81, 27, 18, 9 and 3 I ruled out 81, 27, 18 and 9 as values of y because in all cases y2 would be greater than 27, so the GCF could not be 27. It appears the intended answer is y = 3. However, if y = 3, then x2 y2 becomes 9x2. In order for this to have a GCF of 27, x2 must contain at least one factor of 3. If x2 contains a single (or odd number) factor of 3, then x must contain a factor of square root of 3, and x will not be a positive integer, which violates the problem statement. If x2 contains two (or an even number) factors of 3, then x will contain one or more factors of three, and the GCF will be at least 81, which violates the problem statement. What am I missing?? Any thoughts? Thanks
  12. OldChemE

    Infinite monkeys and Shakespeare

    I too agree that given sufficient time the works would be reproduced-- but there is no guarantee that the works would be produced in any finite time. The catch is that, if the letters are being produced at random, multiple repetitions of previously produced patterns may occur. In other words, this is different from a computer produce methodically working through all the permutations of letters. Thus, we can posit that the works of Shakespeare will eventually be produced but we cannot know that it will occur within any arbitrarily large finite time.
  13. he example of 6 + 6, 4 + 8 and 8 + 4 is different from 6 bolts and 6 nuts, 4 bolts and 8 nuts and 8 bolts and 4 nuts because the first set are pure numbers, the second are things. In other words, let x = bolts, y = nuts. Then your two examples form to : Numerical equivalence: 6 + 6 = 4 + 8 = 8 + 4 But for nuts and bolts 6x + 6y does not necessarily equal 4x + 8y which does not necessarily equal 8x + 4y Said differently, that which holds with pure numbers need not hold when representing numbers of things.
  14. OldChemE

    What’s your favorite video game?

    Not much-- boriiiiinnnnngggg!
  15. OldChemE

    how do i find someone based on ip adresses.

    and-- it seems like locating based on IP addresses can be faulty. In Northern Nevada where I am we get our internet via a large cell phone provider. Every time we try to check to see if something we want is available at Walmart the internet links us to a store 500 miles away in California. I'm wondering is this has to do with the way IP addresses get assigned.