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    Information about laminated materials?

    Hmm...laminates. You could take a PhD in that topic and still not know everything, the field is that vast. When people talk about strength, there are usually 3 primary types of 'strengths' they could be referring to - yield strength, Elastic modulus and toughness. One definition of the YS...
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    QM or Relativity first for self learners?

    *Starts taking notes* :smile: How about Feynman? From what I was told by some that he is good, but at times tends to dwell too much on superfluous points. Otherwise I still have the textbooks from my A-levels (with lots of unread chapters on QM & Relativity...), like Young and Hecht...
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    QM or Relativity first for self learners?

    I decided to expand my knowledge on Physics a little from what I was taught at school, which was mostly classical/Newtonian stuff. I am planning on learning both Quantum Mechanics & Relativity. Which one should I learn first, so that the knowlege from that first subject would help me learn the...
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    How does incoming air temperature affect peak boost in air compressors?

    Tony, from our PM correspondence, you seem to have access to a rig IRL (correct me if I am wrong). Could you try testing with either just the compressor alone, or the engine without the compressor, under winter and summer conditions? I am trying to see if the improved efficiency you spoke of...
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    Is there an optimum hardness for bone?

    Obviously, anyone with osteoporosis can tell you that bones can be too soft. But can bones be too hard? I thought that this may be possible because part of cushioning we get when we do everything from walking to jumping, comes from the flexing/compressing of bones (however small). The rest...
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    Nerve impulse amplifiers

    Okay...my biology knowlege is very rusty, but aren't both the nerve impulse and the muscle composition the factors here? So the nerve impulse to lift a 5kg mass is less than the nerve impulse to life a 10kg one. Or for the same nerve impulse strength, a larger muscle will have an easier time...
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    Nerve impulse amplifiers

    Can any biology-savvy people comment on the viability of implants which boost the nervous signals to muscles, effectively making someone superhuman in strength and endurance? I can see how someone with these implants may end up killing themselves from over-exertion, but would something like this...
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    Let's hear it for maintenance engineers!

    LOL. I was on a flight from Sydney to Adelaide during a holiday to Australia some time ago, and the flight attendant over the PA went something like: "Ladies and gentlemen, welcome aboard the Qantas flight from Sydney to Perth." At which point, everyone started looking around and panicking...
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    Physics of superchargers/compressors

    My pleasure, Tony. Would my first reply with regard to the Joule-Brayton cycle answer your first new question? If you can elaborate a bit more on what else is puzzling you, maybe I can shed some light. It was pretty fun to exercise those cerebral thermo muscles which I have not flexed in ages [b(]
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    Some thoughts on Racism

    By the way, if I may digress slightly to the issue of sexism, I read a comment in a magazine by someone in a arcturial/statistics company that the IQ curve for men tends to be broader, while for women it tends to have a smaller standard deviation. So you get less morons for women but more...
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    Physics of superchargers/compressors

    The only factor which determines how much the piston is going to compress is the maximum force you can exert on the piston. If the piston is ideal (perfectly sealed, etc.) then as you reduce the volume of the working fluid, you will approach infinite pressures. The initial pressure, P_1, I...
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    Pacifists ? Pah!

    Be wary of trying to judge various sides of a conflict based on ethics and morality. Remember that suicide bombers die thinking what they are doing is right, and that they will go to heaven. Idealistic people with an easily affronted sense of morals/ethics are the easiest for people like...
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    Physics of superchargers/compressors

    I am not quite sure what you mean by "difference". Are you talking about fractional or absolute differences? Your starting point should be the work input into the container and its initial total temperature. Work done = {\int}{P}{\cdot}{dV} If you set up the experiment so that the...
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    Pacifists ? Pah!

    Yes. Of course. I just couldn't restrain myself from putting in my tuppence worth
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    Physics of superchargers/compressors

    Hmm...the term 'supercharger' is something that was simply called a compressor in turbines in my degree. After some Googling, I think this is what you are talking about (correct me if I am wrong). In which case...your point of reference should be the standard Joule-Brayton cycle. A...
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    Pacifists ? Pah!

    What has economic sanctions, isolation policies and social/cultural exports to certain turbulent countries gotten the West? September 11, the Bali bombings, continued terrorism in Israel, religious fanaticism/extremism. Thats what. Take Israel/Palestine. Just about everyone I know says that...
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    Google this

    Try "French military victories" instead
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    Pacifists ? Pah!

    Conflict is the ultimate force of social evolution. It is the social analogue of biological Darwinism. As brutal as it may sound, the biological analogue weeds out the weak in favour of the strong - ruthlessly. Keep in mind that our concepts of 'ruthless' and 'brutal' is entirely arbitrary -...
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    Some thoughts on Racism

    I am only relaying what I read online a while ago. Please do not shoot the messenger. I note that you did not mention me explicitly, and thank you for that. However, I am just pointing that out before someone accuses me of something unpleasant. From my prose, you can quite clearly see I do...
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    Some thoughts on Racism

    As I understand it, these racially biased laws were implemented under the guise/logic of affirmative action; i.e. "The Malays are worse off so lets give them some economic and educational assistance." This happened after Independence when the various political parties were still trying to hold...
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    Some thoughts on Racism

    Asian minorities don't seem to have that problem. They get ahead even without affirmative action. Even with all the immigrant stigma, financing and visa issues they are burdened with. The opportunities can be equal, and even more than equal...but to speak metaphorically, some fish simply won't...
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    Some thoughts on Racism

    Being an atheist, I am in a comfortable position to see either side of the Israeli/Palestine issue. As for your point about the Israelis taking Palestinian land, go back a few centuries more and it was actually the Arabs taking Israeli land. The Israelis are just...returning home. I think it...
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    Some thoughts on Racism

    I think the system should be entirely meritocratic. How far you go and what you succeed in should be determined only by your relevant qualities/traits/skills. If there are 100 positions and it so turns out (unlikely) that only 1% of whites in a 99% black community are suitable for the job for...
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    Commuter trains should have sleeping cabinets

    You've got to teach me how to do that, mate [zz)] My last job had a 90 min commute to work .
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    Steel variations questions

    Ask away dude. It is actually quite fun, in a nostalgic way, to get asked the stuff I too, used to pore over (usually a few days before the exams [b(]). Of course, you should know that my exposure to materials science only came through the modules I took in my engineering course, and was not...
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    Commuter trains should have sleeping cabinets

    Probably because a person lying down takes up more plan area than a person standing up, or seated. As the bottom line is profitability, they want to cram as many sheep (us) as possible into the train to sell the most tickets. I've also nodded off and slept past my station. Not nice. I'd...
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    Genetic engineering of us humans

    Unless you are talking about transgenics which are genetically modified after they are conceived, I don't see how genetic engineering can be a conscious decision for children. Can we unanimously agree that smarter, stronger, fitter and longer-lived is better? If we can, then I don't see why...
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    Steel variations questions

    I too, think traditional metal blades are better than ceramic ones simply because they are tougher and won't break when you accidentally hit them too hard. There may be a few niche applications where ceramic blades are more popular, but I am not a knife-maniac so I can only speculate. Fooling...
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    Genetic engineering of us humans

    What is your opinion of it? Do you approve of it? I think that there is no law which states that evolution of a species has to be a purely natural process that does not involve the 'artificial' intervention of the own species. If a species were developed and intelligent enough to tinker with...
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    Cantilever question

    Tip displacement for a point force on a simple beam varies with the longitudinal distance variable in a cubic manner. For very small z, this can be approximately linear (a z^n \rightarrow 0 argument for n > 1 and z < 1). Still, I think your friends are lying. You are talking very small z...
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