13,006 karma · joined November 12, 2013
It did not even want to build a proper launchpad at Boca Chica, which did not work out so well.
"As it turned out, the inaugural flight was a bit of a mixed bag. Neal Casey, an 18-year-old technician stationed on the Midway, later recalled how the missile tilted dangerously starboard and headed toward the vessel’s own command center, known as the island.
"“I had no problem tracking the rocket,” said Casey, according to the USS Midway Museum. “It almost hit the island.”"
The Wikipedia article says there are solutions to the classical equations of motion: one in which the ball remains stationary forever, and then all those where, after an arbitrary period during which the ball is stationary, it rolls off the dome in an arbitrary direction. What makes this indeterminate is that the analysis of a single initial state yields multiple possible outcomes.
The article goes on to say "Notice in the second case that the particle appears to begin moving without cause and without any radial force being exerted on it by any other entity, apparently contrary to both physical intuition and normal intuitive concepts of cause and effect, yet the motion is still entirely consistent with the mathematics of Newton's laws of motion so cannot be ruled out as non-physical."
This raises the question of what we mean by 'physical', and whether theories of physics define the physical or describe something existing independently. I will leave that to the more philosophically minded; for myself, I will just note that as there are cases (and physically realizable ones at that) where classical physics gives answers that are not merely indeterminate but outright wrong (the ultraviolet catastrophe being a canonical example), I don't think anything of consequence hangs on this particular case.
https://en.wikipedia.org/wiki/Norton%27s_dome#Solutions_to_t...
https://www.scenichudson.org/explore-the-valley/outdoor-adve...
The mention of culture is not out of place in the article, as the marshmallow test (which features quite prominently in it, including in its actual title) does have different outcomes in different cultures, and, in addition, it is hardly controversial to suppose that the way children are brought up is an important factor in establishing and maintaining a culture's cohesion.
If anyone gets to judge, however, it will be SCOTUS, not voters. It's hard to guess, right now, whether that's a plus for security.
At best, this is just another example of the sort of nonsense we can expect from an administration which will not speak sense to power, but it could also be seen as a thinly-veiled threat to California and all other states dependent on resources controlled by the federal government.
https://abcnews.go.com/Technology/world-smartest-dog-nova-sp...
This would not imply a facility for language understanding and resoning to anything like the extent we have, but it is the sort of preliminary step that might have opened the door for language to evolve in our ancestors.
I also skimmed the page and saw that equation 20 is not a wave equation (as the article says, it is a diffusion equation.) Again, I am not sufficiently knowledgeable to say whether that renders the question of impedance matching moot.
Update: I see from the sibling thread and its excellent reference that the refractory period, where the sodium and potassium ions are being pumped back to their starting positions, suppresses reflection.
The lack of communications means that the pilot could not be warned of the specific difficulties and dangers of landing on a moving aircraft carrier, over and above the ordinary difficulties of a short-field landing of the sort every pilot is supposed to be proficient in. In that circumstance, my guess is that minimizing the novel dangers would be the way to go, but, as you say, we are all just guessing here.
At first sight, it might seem the situation is just like a high-wind landing on an airfield, but there is a difference: on an airfield, if you line up for, say, a 3-degree approach, but the wind is stronger than you anticipated, you will need more power, it will take longer, and your descent rate will be reduced, but your flightpath will be as planned, with that 3-degree slope. In the case of a ship moving away from you, not only will you need more power than anticipated, but the path you follow will be shallower than planned, as it ends further away than anticipated.
It was always possible that the airplane could have gone off the bow with insufficient speed to do a go-around, but it might also be the case that the shallow approach was a consequence of trying to land on a target moving away, and that made it difficult to spot-land. My guess is the latter, though of course I can't prove it.
With a 40 kt wind down the deck, one would need the brakes to avoid being blown backwards off it, or into a reverse groundloop which might well lead to the same outcome.
I recall from flight school one instructor who liked to demonstrate that the aging Cessna 150 he was often assigned to could be landed in the width of a runway (as performed at an intersection.)
You will not see this alignment if you are at the south pole or other points sufficiently south of the antarctic circle, either, given the time of year.
Update: From this map [3], the pole appears to be on the rim of the crater touching crater Tolkein on the latter's right (see ahazred8ta's comment for a link to an annotated copy of the photograph), and in the photograph, that part of the rim is illuminated.
[1] https://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact....
[2] Data from [1] and https://en.wikipedia.org/wiki/Sun:
Solar radius: 7e8 M
Mercury aphelion: 7e10 M
Angular radius at aphelion = arctan 0.01 = 0.57 degrees.
[3] https://pubs.usgs.gov/sim/3404/sim3404_sheet2_.pdf