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    How to get started with stocks?

    Why day trading? The taxes are higher, you will pay a lot of brokerage fees (for frequent trading), and it is mostly gambling unless you have insider knowledge that the general public does not have. Not to mention you generally need $25,000 minimum to trade on margin (I think trading on margin...
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    New auto dog dish

    Maybe a sliding lid for the bowl portion so that when you open the top it doesn't come gushing out? Could develop a mechanism that required you to lock a lid in place on the bowl before the top would open.
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    Generating Heat

    Well, they already make hockey tape that is sticky on both sides. You could find a way to adhear a thin layer of salt on the outside of the tape. Some people rub wax on their stick blade after it has been taped in order to help try to protect the tape. Perhaps you could create a wax/salt...
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    Casi.Voy equation

    Maybe I am wrong, but it looks similar to coulomb's law http://en.wikipedia.org/wiki/Coulomb%27s_law
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    The most knowledgeable person on Earth

    I guess it depends on quality or quantity of knowledge, but it is worth mentioning Kim Peek (I guess he died two years ago though). I saw a documentary on the science channel some time ago that credited him as probably the most knowledgeable person. "According to an article in the Times...
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    News US Supreme Court rules on violent video games

    I read the ruling, and while I agree with it, I was slightly confused. Part of the majority opinion said something to the effect of "there is no precedent in the US to restrict minors to exposure to violent entertainment" or something like that. What about "R" rated movies, and the fact that...
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    Radiation device

    Hmmm.. well anyone who works at a nuclear power plant must enter a whole body counter before he/she leaves work to ensure that he/she is not leaving with any contamination. The counter is designed to measure both internal and external contamination though. I guess if you cleaned up/stripped...
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    Car troubles D:

    Sometimes eratic RPMs and jerky shifting can be symptoms of a bad Throttle Positioning Sensor, which is pretty common and a cheap fix (guessing $150-$300?). Try googling more info to see if other symptoms match up.
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    Non nuclear part of a nuclear power plant

    The turbine/generator are on the "turbine deck" which is housed in the "turbine building". Those are the only names I've heard around here.
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    Why isn't the cooling system power-independent?

    The emergency core cooling systems of a nuclear plant are not designed to run on external power. All events/accidents are postulated with a coincident loss of offsite power (one cannot credit offsite power in accident analysis). Therefore, the emergency core cooling system power must come from...
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    Non stick pots and pans

    Nonstick pans are great, but they do have their limitations. When using a nonstick pan you should never use very high heat, it will cause the nonstick surface to degrade. If you need a good sear (high heat) try using either cast iron or stainless steel. Never never never use metal utensils in...
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    Plagiarism checker?

    Whenever I was in highschool we had to submit essays through a plagiarism checking service. Apparently the software would highlight parts of your paper in different colors for different degrees of plagiarism. Red was a direct copy/paste, yellow was bits and pieces matching, and blue was no...
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    Need help finding the relationship between force and acceleration

    I may be wrong here, but I think Newton came up with a famous equation that relates force to acceleration.
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    Good Marketing or wasting energy

    I've seen various products like cereals or chips featured on "how it's made," and the person giving the factory tour said that the nitrogen bubble that they put in the bag is truly needed to preserve the freshness of the product and that it's not some gimmick to short change you. Whether or not...
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    Teen suspended for religious nose ring

    "Church of body modification"? This is kind of like that time I tried to convince my teachers I was joining the "church of beer" - didn't go over quite so well. I think if she was hindi or some other widely known/respected religion, the school would have had no problem with her claim. I...
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    First Time Home Buyer (Savings Question)

    If you are looking to buy a home in the next 5 years I'd say savings account. ING gives me 1.1% and I think ally bank is giving around 1.25% atm. 5 years is way too short to try the stock market unless you create a very conservative portfolio (even then you can lose money!) in which case you...
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    Nuclear waste waste

    Never heard of this unless the person had a medical procedure involving radioactive isotopes. I thought this is what already happens. Most anti-contamination clothing is designed to disolve completely in a chemical bath. The chemicals can be filtered and reused. The only radioactivity...
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    Hide and seek on a planet

    What class/chapter is this for? Has me stumped atm unless the problem statement is incomplete.
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    Order of Magnitude

    Does the room have to be a square? If so calculate the dimensions of the square. If you know the width of the room and the total width of each shelf/corridor then you know how many shelves/corridors can fit into the room. That's a good start at least. Where you gettin tripped up?
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    Cost of Regulations?

    Not to mention those "periodic questions and audits" often lead to commitments to upgrade or replace said safety systems which can cost on the order of tens of millions of dollars (per project). Security has been a focus in recent years after 9/11. Adding additional fencing, security staff...
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    His mom frequently sends him home-cooked food through some bus

    buy one of those mini styrofoam coolers from the dollar store and a package of gallon sized ziplock bags. The coolers are cheap, light, and disposable. pack the ziplock bag with ice and put everything in the cooler. could use freezer pack as someone else mentioned or even dry ice if you want...
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    Medical Question about the bends

    How can the depth affect your internal pressure? I imagined the body as a closed system and while the water is trying to squish me, it should have no affect on my internal pressure. The only open part of the system is when I am breathing the high or low pressure air into my blood stream. If I...
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    Medical Question about the bends

    Question about "the bends" From what I understand a SCUBA diver's breathing equipment will supply him with air at a pressure that correlates to the surrounding water (probably to make it easier for your chest to expand/contract naturally under high pressure water). The higher pressure air...
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    Flow rate calculation using pressure difference and time

    I can take a stab, but I can't garantee that this is right. You be the judge. Density of nitrogen at 6000 psi = .3759 kg/L Density of nitrogen at 2600 psi = .1986 kg/L Initial mass of nitrogen = .3759kg/L * 42L = 15.79 kg Final mass of nitrogen = .1986kg/L * 42L = 8.3412 kg Total...
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    Why do astronauts feel weightless inside a space ship and centrifugal force?

    In addition to what Routaran said, the engineers and scientists that plan the launch calculate the exact elevation and velocity needed so that the gravitational force and centripetal force balance each other out. Since the forces cancel each other out, the net force on the astronauts is zero...
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    Enjoy your meal

    I've been to a fair share of fancy restaurants with at least one of them being ranked in the top 10 French restaurants in the country (US). After the waiter finishes his spiel explaining each part of the dish he almost always says "bon appétit" or "enjoy".
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    To play the lottery or not?

    There are times when it is "smart" to play the lottery. You occasionally hear on the news of some state's lottery getting up to a huge jackpot. Using academic's example lets say the state lotto worked its way up to $350,000,000. His example then becomes (350,000,000)*(1/41416353) +...
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    Name brands vs generic brands

    I have noticed a big quality gap in generic vs name brand tools. I used to think that it was a rip off to pay $5 for something simple like a craftsman screwdriver since the generics are available for like $0.50. However, the entire set of generic screwdrivers I have are now either rusted or...
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    Buying car on credit, is this a sound decision?

    There are only two things you should ever willingly go into debt for. One is an education, the other is a home (if you are starting a family). You should only go into debt for a car if there is no other way around it. From the looks of it, you don't need to. If you feel your car is shaky...
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    Rearranging an equation

    try the quadratic equation
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