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  1. mnmman

    Sunlight Intensity Concentrator - Idea to boost solar energy

    So I had this idea and I want to run it by some people and see if it's 1) possible 2) worthy of pursuing further 3) a good idea. I don't have a degree in engineering or physics, I'm currently studying chemistry and am taking physics 2 (E&M) right now, so excuse me if I don't use the correct...
  2. mnmman

    Where is the alcohol peak on 5-iodovanillin?

    So I'm pretty sure I got 5-iodovanillin. The melting point in the literature is 183-185 C and I got 182.7-183.5 C. But my NMR spectrum isn't showing the alcohol peak. It barely shows up on the SDBS spectrum also (http://sdbs.db.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi). Does anybody know why...
  3. mnmman

    Hybridization of carbanion in rings

    So this question asked me to determine whether this compound was aromatic, antiaromatic, or nonaromatic and also asked how many pi electrons there were. I figure since there are four groups of electrons the carbanion is sp3 hybridized and I think I'm correct because that is what this thread...
  4. mnmman

    Polarization of an Insulator

    So I just started Physics 2 Electricity and Magnetism and I'm already scared for my life. The professor first did a demonstration where he charged up a Teflon rod on some sort of cloth and moved an aluminium can with the rod. I understand how that happens. The can is a metal and conductor so the...
  5. mnmman

    BP and MP of Caffeine

    Pubchem says the BP of caffine is 178 deg C (sublimes) and the melting point is 236.2 deg C. Below is the only phase diagram I found for caffeine. Aren't the MP and BP measured at 1 atm? If so according to this phase diagram it shouldn't sublimate correct? Assuming the phase diagram is wrong...
  6. mnmman

    Schools Enlistment is ending, seeking advise on applying to universitys

    Hello PF members, I'm a 21 year old combat engineer in the marine corps. My 4 year contract is about to end next July and I want to start preparing myself for undergrad school. I've already started the application process (for fall of 2013), but some of it's confusing. It asks for high school...
  7. mnmman

    Concentrated Photovoltaics, Parabolic Mirrors

    The idea of a parabolic mirror to focus light onto a small solar panel popped into my mind the other day. I searched Google and this is about the best thing I found- http://www.greenrhinoenergy.com/solar/technologies/pv_concentration.php and...
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