Senior Members
  • Content count

  • Joined

  • Last visited

  • Days Won


Sensei last won the day on September 21

Sensei had the most liked content!

Community Reputation

783 Glorious Leader

About Sensei

  • Rank

Profile Information

  • Interests
    Quantum Physics, C/C++/.NET Framework/Java programming.
  • Favorite Area of Science
    Quantum Physics

Recent Profile Visitors

42064 profile views
  1. small explosion in bathroom

    Make photos of the all ingredients and attach in reply. It'll be easier to tell what reactants you had, and what reaction could occur. Listerine is known to contain ethanol. "toilet bowl cleaner" could have bleach (chlorine or peroxide-based).
  2. Menopause

    You know that evolution is not working this way. Majority of wild female mammals are dead long before oocytes are exhausted.
  3. Menopause

    "Ovarian aging As women age, they experience a decline in reproductive performance leading to menopause. This decline is tied to a decline in the number of ovarian follicles. Although about 1 million oocytes are present at birth in the human ovary, only about 500 (about 0.05%) of these ovulate, and the rest are wasted. The decline in ovarian reserve appears to occur at a constantly increasing rate with age,[17] and leads to nearly complete exhaustion of the reserve by about age 52. As ovarian reserve and fertility decline with age, there is also a parallel increase in pregnancy failure and meiotic errors resulting in chromosomally abnormal conceptions.[medical citation needed]"
  4. sticky mass

    If you meant "how to separate chemical compounds?", you should start from reading this article and its links: It should give you brief idea which procedures are available.
  5. Chemical bond during touching

    Hydrogen bonds are existing even in plain water (which is in skin).. "This type of bond can occur in inorganic molecules such as water and in organic molecules like DNA and proteins. Intermolecular hydrogen bonding is responsible for the high boiling point of water (100 °C) compared to the other group 16 hydrides that have much weaker hydrogen bonds.[3] Intramolecular hydrogen bonding is partly responsible for the secondary and tertiary structures of proteins and nucleic acids. It also plays an important role in the structure of polymers, both synthetic and natural."
  6. Mg from C10H6MgN4O8

    It is, but it must be pure Carbon. Carbon compound contaminated by other elements will release CO, CO2, NO, NO2, H2O, etc. etc. gases. e.g. if you have MgCO3, after heating it to high enough temperature (>= 350 C), it will decompose to MgO solid and gaseous CO2
  7. Could all diseases start with the head? Occupational stress (because of its long duration) can cause immune system dysfunction and weakening. Therefore body can't fight with microbes and viruses as efficiently as normally. Mental disease like depression, heart attack, or stroke, can be direct result of stressful situation, without additional influence of microbes. Mens sana in corpore sano
  8. Did you hear about equations with two variables?
  9. Identifying glassware

    This is Liebig condenser with adapter allowing to plug thermometer or other element.
  10. Mg from C10H6MgN4O8

    CO, CO2, NO, NO2, etc. etc.
  11. Mg from C10H6MgN4O8

    You just have to heat it to high enough temperature..
  12. Sodium

    To store reactive metals there is often used mineral oil.
  13. Real Volume of solvent

    Water is solvent. Water + dissolved NaOH is solution. Mass of solvent and mass of dissolved substance add together in solution (quantum scale of mass is lost or gained if reaction is exothermic/exoenergetic or endothermic/endoenergetic). With volume it is no so simple.
  14. square root formulas

    What advantages.. ? Trigonometric functions are extremely slow to calculate (by CPU/FPU)... sqrt(x) is just generalization of power of x^0.5 cube root(x) is just generalization of power of x^0.3333333(3) ps. Make function that is calculating something faster than currently existing methods, and you will have attention from scientific community, and more importantly from computer designer community (faster operation is always welcome by programmers and users of applications). You need to benchmark currently existing methods and you own method to verify your method is faster than native, and alternative implementations.
  15. Synthesize two chemicals

    You might need to use "dropping funnel". It is allowing to very precisely control speed of mixing reagents. Drop by drop for 2 hours. If compounds are dangerous, or there is need to precisely control stirring, you might need "magnetic stirrer". Plastic-coated bar with built-in magnet is placed in the container with liquid, which is placed on top of magnetic stirrer (it has electromagnets). Magnetic stirrer can have built-in hot plate to (optionally) heat liquid that's stirred.