Recent content by Baluncore

  1. Baluncore

    High School The world is not enough

    Born in the UK, now live in the antipodes. I have been backwards and forwards a few times, but mostly they cancel, leaving 1½ to the East. You and I have the same winding number, ±½ .
  2. Baluncore

    Will anyone alive today see a permanent colony on the Moon or Mars?

    That can be achieved with LSD, or the hallucinations of AI, without any need to contaminate Mars with the human epidemic from Earth.
  3. Baluncore

    High School The world is not enough

    I guess that means you are well sprung.
  4. Baluncore

    High School The world is not enough

    The sum of my net global travel, has me travelling 1½ laps of the Earth from West to East. Should I make my next circumnavigation from East to West, to undo the extra day-night cycle of aging that I have suffered? Am I celebrating my birthday one, or two, days early?
  5. Baluncore

    Undergrad Question of accuracy of galactic collision simulations

    Numerical simulation is accelerated by grouping individual objects into local pools, having linear and angular velocity, mass, and the position of the centre of mass. That pooling is done at very many nested levels in the model. A pool of pools, on the other side of the modelled universe, will...
  6. Baluncore

    Undergrad Questions about bubble behaviour

    https://fyfluiddynamics.com/2023/07/bubble-trails-straight-or-wonky/ A more thorough analysis, but of air, not CO2. https://pubs.aip.org/aip/pof/article-abstract/29/12/122104/989879/Shapes-and-paths-of-an-air-bubble-rising-in?redirectedFrom=fulltext
  7. Baluncore

    Undergrad Questions about bubble behaviour

    I agree with what you write, but I think we need to look more closely at the circulating cell below the bubble, and the density variation within that cell. I am reasonably certain that the bottom of a large bubble is flat, but with a peripheral meniscus. The fact that the miscible oil-alcohol...
  8. Baluncore

    Piston suction pump versus external gear pump as vacuum pump

    Why worry, The OP is gone.
  9. Baluncore

    Development of a Bike Trainer (rollers)

    I don't believe you. The tire contact patch follows the circumference of the roller. The roller pushes against the tail of the contact patch, as the head of the contact patch is pushed against the roller. Those two areas are equal, and present the same balanced tire pressure to the roller, so...
  10. Baluncore

    Undergrad Spectrometer of James Webb Space Telescope

    What is meant by "solid-phase methane" or "methane ice" ? If the methane is held in the form of a clathrate, then methane will be released with the release of the water.
  11. Baluncore

    Undergrad Spectrometer of James Webb Space Telescope

    Should you also consider that the more intense sunlight may ionise CO2 into CO and O ? Is that the source of the CO ?
  12. Baluncore

    Undergrad Questions about bubble behaviour

    Yes, but it is a lesser effect. The bubble rests in the surface as it contains heavy, higher pressure gas, compressed by the bubble's surface tension. The bottom of the bubble is more or less flat, while the top is spherical. The hydrostatic pressure is therefor lower below a bubble's floor...
  13. Baluncore

    Bad Math Jokes

    Should the limit not be negative infinity?
  14. Baluncore

    Undergrad Questions about bubble behaviour

    I believe you have it backwards. The surface bubble does not control the rising stream of micro-bubbles, the rising stream drives the surface bubble on, or across, the surface. The bubbles form at depth on a nucleation point, maybe an imperfection, or a grain of sugar, on the surface inside...
  15. Baluncore

    Confinement box in the resonator ruins result

    SMA is suitable so long as it is in close contact to the conductive enclosure, without gaps that could act as short slot antennas. The problem you have is not radiation from a slot, so much as absorption of the resonant energy inside the enclosure. A coaxial cable transmission line, and its...