jccooper

60 ms·

661.
by jccooper 11y ago
That would solve a lot of problems. Seems to me it's hard to say you "invented" something if you haven't done it at least once. How do you know your method is practical otherwise?
662.
by jccooper 11y ago
Show room charger is a "destination charger", which is different. Besides, the letter is a nudge, not a ban. But: I don't think I'd buy an electric if I couldn't charge at home, so I don't disagree with you the
663.
by jccooper 11y ago
It seems to have been made from stone from a nearby structure. It would have been underwater by the time anybody with ships came by.
664.
by jccooper 11y ago
Mars Direct uses suspiciously low boil-off rates for LH2. Certainly well past current state of the art. Best achievable (not flown, but could be) is 0.1%/day, and Mars Direct wants 0.1%/month. You don't lose a lot at 0.1%&#x2
665.
by jccooper 11y ago
When people designing real spaceships say "deep space" they mean "beyond Earth orbit", but usually not past Mars. In sci-fi deep space, yes, you'd have next to no solar power. (In fact, it's minimally useful in
666.
by jccooper 11y ago
A long-range spacecraft would probably not have LH2 on board. It evaporates quite quickly unless you want to install cryo cooling systems and the power to run them.
667.
by jccooper 11y ago
It's easier to supply power than mass in space, and mass shielding is the alternative. Solar is problematic on Earth but is actually quite good in space. Lots of reliable energy right there, especially if you're not in Earth orbit
668.
by jccooper 11y ago
Automatics commonly work on recoil, sometimes on gas pressure. Without a bullet, recoil is less (see Newton's laws) and so is gas pressure (there's no temporary plug in the barrel). Most semi-auto pistols will not operate with bla
669.
by jccooper 11y ago
Mostly it was to be cheap, though.
670.
by jccooper 11y ago
In 1985 the Supreme Court ruled that police are allowed to use deadly force to stop a fleeing suspect only if they have "probable cause to believe that the suspect poses a significant threat of death or serious bodily harm to the offic
671.
by jccooper 11y ago
http://faradayfuture.com/
672.
by jccooper 11y ago
You can see stars near the moon, but your eye has much better dynamic range than a camera. See how many stars you see near pictures of the moon: https://www.google.com/search?q=moon&tbm=isch Most photos from space don&#
673.
by jccooper 11y ago
Bullet goes about 1.2 km/s at best. New Horizons is going ~14 km/s relative to Pluto. That's a heck of an impact to survive. You could do it on Earth by braking in the atmosphere, but there's not a lot of that on Pluto.
674.
by jccooper 11y ago
Underground nuclear explosions are fairly well contained; done at the depth required to deal with a fault, they'd probably be unnoticeable. Also, perhaps impossible, but that's a different story.
675.
by jccooper 11y ago
Of active craft, yes. I had to double check; I became suspicious when I saw nothing Russian, but indeed there are no active Russian probes.
676.
by jccooper 11y ago
What's a bit more disappointing is how little we know about the "ice giants". Both Uranus and Neptune have been visited only by Voyager 2.
677.
by jccooper 11y ago
Varies by location. There are plenty of deregulated markets and plenty of still-monopoly markets.
678.
by jccooper 11y ago
All that long-term stuff is real, for sure, but mostly in the 7+ year range. I'd love to have a car where the the engine didn't start disintegrating part by part at the 10 year point, but I'm afraid with an electric I'd
679.
by jccooper 11y ago
Low altitude mapping orbit, Dawn's final destination (at around December), will be 230 miles (375 km) up, and will have a resolution of 120 ft (35 m) per pixel. Currently it's about 410m per pixel. So it's going to get a lot
680.
by jccooper 11y ago
The spacecraft itself isn't a particularly big deal on these missions. They will usually use an existing bus or put together existing subsystems. So basically they already do as you suggest. Cassini, currently around Saturn, is directl
681.
by jccooper 11y ago
Judging by the graph there was a serious inflection point in 2008. Which seems about right from what I remember. So it probably should have been a headline long before now.
682.
by jccooper 11y ago
Minimalism is a strong feature of Twitter. The effect of lifting the character limit is unpredictable, and I'm not certain it would be positive. It could be, but my personal reaction would probably be to use it less if the fire hose in
683.
by jccooper 11y ago
They're hoping to enable cubesats (or at least small sats) to do deep space or planetary missions by proving a low-mass and low-complexity propulsion system.
684.
by jccooper 11y ago
But it would support the idea that handling money is improper.
685.
by jccooper 11y ago
Waiting for the hottest stuff to go away is part of the recycling process. It's just a very slow part.
686.
by jccooper 11y ago
East Germany was in poor condition relative to West, but nowhere near as disparate from the west as the Koreas are from each other. Though in East Germany you could get no bananas, in North Korea you can't get rice.
687.
by jccooper 11y ago
In pre-industrial Scotland, the Shetlands may have been nearly as close to the Borders as Edinburgh, especially if the Tweed was navigable (even for small boats) at that point. Before good roads and (especially) mechanized transport the sea
688.
by jccooper 11y ago
Is it really non-refueled? Solar probably needs to be its own category. The refueled endurance record is crazy. 65 days in a Cessna, refueling from a pickup truck.
689.
by jccooper 11y ago
The lines are deep enough, with tunnelling, to avoid historical layers; mainly it's the stations that end up with archaeology.
690.
by jccooper 11y ago
It's mostly unknown in the popular consciousness. To the extent Americans know or connect to anything about old world history and places, it's basically western Europe, which includes the Romans and Greeks due to the Renaissance.

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