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NigelSimmons @startrek.website
Posts 0
Comments 8
Harm
  • Believe this was featured in a paper that recently used trig to prove the Pythagorean theorem (previously thought to be a circular definition). I think some highschoolers cracked it as part of a mathematics challenge or something.

  • The M2 Browning is still in use in space.
  • Major concern here for LEO engagements is that any shots that miss are a liability coming back to hit the gunner.

    Basically once a bullet's fired, a new orbit is defined for that bullet, a new elipse can be drawn. That now elipse is constrained by the position and direction of that bullet the moment it's fired. Unfortunately that means that one bullet orbit later the bullet is going to be in the exact same position with the exact same velocity. The gunner had better hope that orbit phases are misaligned.

    Shooting at targets in the retrograde direction might be safest, they're more likely to dip into the edge of the atmosphere and start to lose a bit of velocity ensuring they never come back.

  • The M2 Browning is still in use in space.
  • But actually, if you had no gravity acting to change the velocity vector, the bullet would continue in a straight line. If you shot at the horizon it would be like drawing a straight line tangent to a circle. The bullet's not going to end up going in the shooters azimuthal direction, but it sure is going to gain altitude as the curvature of the body peels down way away from the straight line it's flying,

  • Groundbreaking barium titanate solar panels are 1000x more powerful than existing panels
  • "The result surprised even the research group: compared to pure barium titanate of a similar thickness, the current flow was up to 1,000 times stronger, despite the fact that the proportion of barium titanate as the main photoelectric component was reduced by almost two thirds."... So not actually 1000x better than current technology, just 1000x compared to pure barium titanite. Garbage clickbait, but "clever technique applied to ineffective solar cell technology scrapes 1% efficiency when used in UV spectrum" does not have the same appeal.

  • Is it safe to connect a small 5W 5V solar panel directly into a portable power bank?
  • Are you going to wire the solar to a usb connector and plug it into the bank charging port? This is probably the safer way of approaching this.

    Also, sometimes the quoted voltage is a "nominal working voltage" kind of deal. Grab a multimeter and see how many volts the solar cell puts out at noon without any load, it might be in the 8v range that could pose an overvoltage problem to your bank (that's expecting 5v ) if it fills up completely.