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  1. V

    Anyone here speedcube?

    Yeah, I use the intuitive Fridrich method for the first two layers and a two-look approach for the last layer.
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    Anyone here speedcube?

    I can solve the Rubik's cube fairly quickly. It usually takes me something like 30 seconds, my fastest time is 21 seconds and a bit. I could improve my times a lot by learning all the algorithms for the last layer, but I don't really consider it worth the effort as I have no interest in cubing...
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    Marriage over the phone: under Sharia law

    I agree, indeed it would be quite silly if they did in today's society. The Sharia isn't a holy book though, it's a law on which various countries base their legal system. These punishments are actually put into practice by courts in many muslim countries. Since 2003, one can also do that with...
  4. V

    Marriage over the phone: under Sharia law

    Yes. Adultery, blasphemy, and homosexuality are too.
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    Why does a car continue to run when the engine is turned off?

    1. The ignition turns off when you turn the key, so the engine doesn't run. The wheels turn the transmission and the engine, so the engine does keep rotating and the tachometer will still show the RPM. It won't respond to throttle though, the car will just come to a stop. 2. The starter motor...
  6. V

    Name of Economist

    Jagdish Bhagwati.
  7. V

    Prime Cell Phones

    Yup, November 5th is right. That's also the smallest sexy prime pair.
  8. V

    Prime Cell Phones

    Tangentially related: both my birthday and month of birth are prime and together they form a" [Broken] pair. Yay. None of my phone numbers are prime though.
  9. V

    Schools How taboo is doing undergrad and grad school at the same place?

    It doesn't really matter that much, but in general it is better to see how things are done in other places and get some connections. I don't consider it taboo at all, there are plenty of people that do both degrees in the same institution. It is strongly encouraged to go to a different place for...
  10. V

    How do you want your coffee?

    A good shot of espresso is just wonderful. Preferably made with freshly ground beans of course, but I don't have a grinder at the moment.
  11. V

    Confused about Voltage and Current

    Regarding generators, the generating power of the generator is (ideally) equal to the product of the current and the voltage it produces, so increasing one means decreasing the other. Therefore you can transmit the equivalent amount of power with higher voltage and lower current or lower voltage...
  12. V

    What are these thingies on suspension bridge cables?

    Those are Stockbridge dampers, a type of tuned mass damper. They're used to suppress vibrations in the cable and thus prevent structural damage and fatigue in the bridge. They're also used on some power lines and other cable-based structures.
  13. V

    What makes the light a wave?

    Perpendicular electric and magnetic fields oscillating in phase. If this electromagnetic wave oscillates in a particular frequency range, we see it as visible light.
  14. V

    Are you a Couch-Surfer?

    I have no direct experience with the service, but I know some people that have surfed and hosted people, and they haven't had any negative experiences. You get a pretty good idea of people beforehand by reading their profiles and looking at other people's references, and you can reject requests...
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    Time = distance/speed conversion problem

    Your speed of light is incorrect. It's not 2.99 x 108 km/hr, it's 2.99 x 108 m/s, which is something like 6.71 x 108 mi/hr or 186,000 miles per second.
  16. V

    Canada vs. USA (Hockey)

    We got the bronze medal, beating Slovakia 5-3. Fantastic performance by team Finland after that frankly embarrassing USA game.
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    Ideas for cool Kinematics Photo

    What kind of camera do you have? If possible, you could take the photo with second curtain flash sync for an effect like this: [Broken]
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    To PF drummers.

    I'm a drummer too, also self-taught. I think right now you should focus on doing simple patterns where you use both your arms and your feet to develop some independence. Experiment and get comfortable with different combinations of moves you can do; playing with your hands and feet...
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    Does centrigual force exist?

    Centrifugal force doesn't exist per se, rather it's a fictitious force that is needed in order to explain motion within a non-inertial reference frame; in an inertial reference frame it's not necessary. It's not considered a real force because it doesn't result from a physical interaction, but...
  20. V

    Member Art Thread

    Yes, although in two of them I used photographs on top of the painted layers for finer detail; the sand texture in the first one and the city lights in the third one are from photos. Am I to take your bulging eyes as a compliment? :tongue:
  21. V

    Member Art Thread

    There are some talented people here, great work. Here are some paintings, of the digital variety, I've made using photoshop.
  22. V

    Winter wonderland

    It seems the contrast between the dark branches and the pure white snow really brings out the chromatic aberration in my cheapo lenses. It was especially noticeable when editing the first shot.
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    PF Photography Thread

    Hey, here are some pictures I've taken. You can click on them for (slightly) bigger versions.
  24. V

    Baby it's cold outside

    It's been around -25 °C (-15 °F or so) for a while here in Finland. It should be getting warmer later this week, up to -5 °C even, and it's also going to snow some more.
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    Interesting interferometer experiment!

    It does seem like gravity is causing some of the components to move. However, a quick Google search revealed that he has built a new interferometer that is lighter and more compact, and apparently the new rig exhibits similar interference fringe shift, though to a lesser extent. It would be nice...
  26. V

    Favorite Classical Music?

    I'm mainly drawn to solo instrument pieces and chamber music over symphonic compositions; Erik Satie, Claude Debussy, Arvo Pärt and Maurice Ravel are some of my favorite composers.
  27. V

    Make a rail gun into a rail motor?

    A rail gun is a motor, albeit a linear one. As for the setup you describe in your post, I don't believe it would work if I'm interpreting it correctly. My knowledge of rail guns is limited but as I understand it, a current flows through the rails and the armature forming a magnetic field, and a...