Recent content by qazwsxedc

  1. Q

    Calculating Hole Size for Desired Flow Rate in Tank/Reservoir

    Specifically, I have a certain flow rate in (volume/sec) and I know the pressure of the resevoir at a certain point. If there is a hole in the tank/resevoir at that point, how big should it be to achieve the given certain flow rate?
  2. Q

    How to get help with theoretical physics?

    my school (UCSB) doesn't allow students to take classes that arent in their major (stupid, I know), but I have been looking into becoming a physics major. The only problem is that its already the last quarter of my junior year so I would have so much catching up to do.
  3. Q

    How to get help with theoretical physics?

    Im a college student with a good knowledge of basic physics. I am majoring in math (unfortunately) but I spend all of my spare time researching physics. I have a lot of ideas for physics inventions but no physics experts to talk with because I don't know any of the professors. When I email...
  4. Q

    Molecular Manufacturing feedstock- nanotechnology

    I know its been a while but I just came back to this, and if anyone is still interested the original question is: Will molecular feedstock(the specific molecules they dump into a machine in order to rearrange them) used for molecular manufacturing be mostly carbon to form nanotubes, graphene...
  5. Q

    Are solar cells more efficient for specific frequencies of light?

    my understanding is that energy is wasted in a solar cells when light with more frequency than necessary to make an electron cross the band gap comes along and the excess energy is converted to heat. does this mean if you only shined blue light at a solar cell which had a perfect electron gap...
  6. Q

    Molecular Manufacturing feedstock- nanotechnology

    From what I understand of nanotechnology, a lot of it is based around assembling individual molecules one by one to make superior materials such as graphene and nanotubes. If this is correct, will most materials be made out of carbon in the future (assuming that they are manufactured with...
  7. Q

    Different ways of slowing down an individual particle

    I was wondering how you can slow down a particle. I know you can have it run into something. I know if its charged, you can introduce it in an electric field. Is there any other way. I remember learning something about a specific type of field that slows down all mass passing though it, which...
  8. Q

    Would it be possible to create a sterling engine out of liquid nitrogen and air?

    Is the heat difference enough to cause a noticeable power output in some type of sterling engine? Liquid nitrogen is quite cheap (alternative fuel source?)
  9. Q

    A falling mass attached to a load/slowing acceleration of gravity.

    If you attatch a falling mass to a load (electric motor, lightbulb, ect.), the mass accelerates more slowly than 9.8 m/s. I know the power of the falling mass is mgh. My question is how to get the mass to fall as slowly as possible, assuming a fixed mass (changing the power that the load is...
  10. Q

    How to collect the energy from the heat of the environment

    It seems like the outside air has a considerable amount of energy in it, at around 298K. Is there any way to collect this energy without expending more energy? It seems like this would be possible. Is there anyway to cool this other than putting a cold object in the air? What would be the...
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