Recent content by litup

  1. L

    B Any updates on the first-ever Parker perihelion results?

    The blog said it only reached full operational status on Jan. 1 so by 12 December, it wasn't fully ready for prime time.
  2. L

    US solar power generation for 2014-17

    What about the economics of non-electrical power storage like deep underground caverns pumped with air and converted with turbines or some such? Of course that would not be a solution for home owners but utilities could do it. The question is the cost compared to Tesla batteries?
  3. L

    What is the Rydberg's formula? Will it be used here?

    Isn't the inverse of wavelength just the frequency? Why not just call it the frequency then instead of 1/wavelength? Maybe it's just the expression of the time it takes to make one wavelength? the time of a single packet of electromagnetic energy?
  4. L

    IQ Score of 128: Analyzing Its Significance

    Well it is not high enough for Mensa. Still pretty high, probably 96th percentile or so. On a good day you could qualify. They cut off anything under 98 percentile. Top 2 percent.
  5. L

    One of my wheelchair motors overheats and stops working

    You can see a small cap on the motor, one or both ends, if it indeed takes oil. Some motors are permanently lubed and so sealed and it is difficult to get oil inside. Look at the motor if you can get to it and see if there is a little cap that swings up to allow oiling. If not, you might try...
  6. L

    I Ferrite Rod Antenna: Understanding How It Works

    Nah, you could use a mere 75 meters also...Seriously, I have thought about the problem for hams using mobile antennae, where you have say a 6 foot whip and special matching networks to get say a 20 meter signal to go through a 2 meter long antenna. I thought about the idea of using a small...
  7. L

    B Exploring Echoes of Electromagnetic Wave Lengths

    Also, the detector may not absorb all the wave energy so some will reflect, some small amount. However, since the detector would be in a place that would have no blockages (otherwise it won't detect some angles and such, you need a free field to get full res). So what would happen is maybe some...
  8. L

    Calculating the Length of a Space Elevator Rope

    The thing bothering me is with a 'rope' 144Km long, the orbital velocity will be a variable all the way up. So how does the rope maintain straightness from bottom to top, outside of small pertubutions?
  9. L

    A Helmholtz Resonator: attenuation vs. amplification

    When you say 'amplify' I hope you don't mean it puts out more energy than it inputs. In old timey American music one instrument was the gallon whisky jug which produced a low tone when blown across the open end. That just allows a buildup of sonar energy but in a smaller wavelength band. It...
  10. L

    Fusion Power Economic Impact: An Overview

    Except for the end game cost where you have massive amounts of useless fission byproducts that have to be sequestered for thousands of years. Take that into consideration in your calculus.
  11. L

    B First Interstellar Asteroid Found

    Well it ain't stopping here, so don't worry about an alien attack:)
  12. L

    Can Broccoli and NMN Help Slow Down the Aging Process?

    I actually like broccoli, cooked and smothered in butter:) I wonder if cooking screws up the NMN bit. I don't mind raw either if I can soak it in sauce.
  13. L

    B What is the utility of grounding in this Transistor case?

    It isn't needed at all unless you are planning to use that circuit in junction with more circuitry. There are cases where you DON"T want ground, where you want isolation from ground. Remember transistor radios or cell phones, there is no ground to the outside world, internal circuitry are all...
  14. L

    Discharging argon gas with a homemade tesla coil

    We use argon as a sputtering background gas and 'ignite' it with a combination of RF, a filament glowing like an incadescent light bulb but with about 400 volts of bias applied to the filament. Between the three, we get 'ignition'. In the presence of just RF, there is an alternate method: in...
  15. L

    I Is sand a better conductor than clay? And why?

    When you say 'conductivity' are you referring to electrical conductivity or heat conductivity? Because if you are talking electrical, sand is basically impure glass and would have a very low electrical conductivity and not much better heat conductivity. Clay, by definition would have a much...
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