"the drought itself is a problem that needs to be addressed or all of the the USA will become a desert": wow, what a prediction! I think you should grow up; I've never heard _that_ prediction from even the most strident climate scientists.
Well, that's certainly a matter of opinion. But regardless, Mashiki wasn't comparing Obama and Trump, he was comparing people in general (I suppose especially US citizens). Read what he said: "...were _people_ so rabidly insane" (emphasis added). He's presumably talking about the protests against the election, not about Obama or Trump themselves. (He also talks about Hilary Clinton.)
I don't understand in what sense it's a perpetual motion machine. They're pumping lots of energy in, getting very little thrust (and therefore momentum) out (assuming the results are correct). A perpetual motion machine doesn't require a net input of energy, right?
I suppose the first thing we'd do if this worked would be to send out a bunch of unmanned probes towards interesting targets, and they would send back information as they cruised by these targets at 1/3 c. Earth is about nine light minutes from the Sun, so 1/3 c means you travel about 1 AU in a half hour. Assuming you start searching for Earth-like planets at a 2 AU out (you'd probably start sooner), the probe would have a couple hours in which to look around for planets, and take telescopic pictures (panning the telescope to compensate for motion during exposure) and other measurements of any planets found. That should be enough to determine whether it's worth sending a probe that would decelerate, or possibly humans. And the initial probe would either go off into empty space, or be re-directed to another star.
For Alpha Centauri, time to periapsis for a non-decelerating probe would be s.t over 12 years (not taking into account how long it takes to accelerate at 1/3 c, and assuming you don't try to accelerate faster than that). Four+ years to get the signal back. So we could know within 20 years whether it's worth exploring any given star system, although for the closest and most interesting targets I'm sure we'd send probes capable of decelerating immediately after the non-decelerating probes, just because we know so little about other stars.
"I planned for this by building a super-efficient (LEED qualified) home with the roof facing solar South." Nice you can do this. Some of us have to buy houses, not build them, and wind up with houses on north-south streets (so the house faces east or west). I suppose we could tear down all those wrongly facing houses and built new ones with the roofs sideways...
What the heck does the second law of thermodynamics have to do with global warming? The second law applies to the entire universe, not just the Earth; every time a star fuses two atoms of Hydrogen into Helium, it's contributing to the entropy of the universe.
You're also ignoring the other major combustion product, H2O, which is not a pollution product (I don't consider CO2 a pollutant either, but YMMV). The approximate equation (from Wikipedia) is:
12 12 O2 + C8H18 8 CO2 + 9 H2O Approx in part because gasoline isn't entire octane, and because there are other biproducts, mostly taken care of in her catalytic converter. Also, if I'd used a fraction in such an equation in chem class, I would have gotten points off, but I guess the point is still clear.
That occurred to me, and I guess a lot of other people. But that is apparently not where the estimate of black matter came from, it came from observations of the rotation of single galaxies. There are posts above about this--look for "rotation."
"Assuming the extra 19 galaxies are of equivalent size." They're not, at least not equivalent to the one. Apparently the astronomers think the large nearby galaxies we see near us are the result of mergers of much smaller ones over time. In other words, the old galaxies--those 19--are much smaller (perhaps 1/20th, IIUC).
"...and the Grand Canyon on Earth" Interesting, I hadn't heard that one. A few months ago I was in the Skocjan cave in Slovenia, see pics here: https://travelslovenia.org/sko.... While most caves in limestone are formed by carbonic acid dissolving the rock, and doubtless this one started that way, it looked pretty clear to me that the canyon you see in those pictures was carved by running water in the same way the much larger Grand Canyon was. Do these AU people think the electric discharges went underground?
I had a 40 year old electric drill (Oster brand!) that I inherited from my father. It did finally wear out, though, after lots of use. I was kind of glad; it used a cord, and the battery kind is much easier to use.
Which makes me think--maybe this spacecraft just needs a very long extension cord!
Slashdot Mirror
Repeal the 18th Amendment TODAY!
There, I fixed it for you.
"the drought itself is a problem that needs to be addressed or all of the the USA will become a desert": wow, what a prediction! I think you should grow up; I've never heard _that_ prediction from even the most strident climate scientists.
Well, that's certainly a matter of opinion. But regardless, Mashiki wasn't comparing Obama and Trump, he was comparing people in general (I suppose especially US citizens). Read what he said: "...were _people_ so rabidly insane" (emphasis added). He's presumably talking about the protests against the election, not about Obama or Trump themselves. (He also talks about Hilary Clinton.)
"We need to live in a climate free World." I think the Moon has one of those. (And yes, I know that was sarcasm...)
That's not what he said, read it again.
I don't understand in what sense it's a perpetual motion machine. They're pumping lots of energy in, getting very little thrust (and therefore momentum) out (assuming the results are correct). A perpetual motion machine doesn't require a net input of energy, right?
I suppose the first thing we'd do if this worked would be to send out a bunch of unmanned probes towards interesting targets, and they would send back information as they cruised by these targets at 1/3 c. Earth is about nine light minutes from the Sun, so 1/3 c means you travel about 1 AU in a half hour. Assuming you start searching for Earth-like planets at a 2 AU out (you'd probably start sooner), the probe would have a couple hours in which to look around for planets, and take telescopic pictures (panning the telescope to compensate for motion during exposure) and other measurements of any planets found. That should be enough to determine whether it's worth sending a probe that would decelerate, or possibly humans. And the initial probe would either go off into empty space, or be re-directed to another star.
For Alpha Centauri, time to periapsis for a non-decelerating probe would be s.t over 12 years (not taking into account how long it takes to accelerate at 1/3 c, and assuming you don't try to accelerate faster than that). Four+ years to get the signal back. So we could know within 20 years whether it's worth exploring any given star system, although for the closest and most interesting targets I'm sure we'd send probes capable of decelerating immediately after the non-decelerating probes, just because we know so little about other stars.
I want to believe.
I thought we invented a fusion reactor that would go on the back of your car? Back in 2015, or before.
I think Stargate Command blocked it.
"I planned for this by building a super-efficient (LEED qualified) home with the roof facing solar South." Nice you can do this. Some of us have to buy houses, not build them, and wind up with houses on north-south streets (so the house faces east or west). I suppose we could tear down all those wrongly facing houses and built new ones with the roofs sideways...
Everyone is fooling themselves, except me.
(In case it's not clear, I'm agreeing with moeinvt)
What the heck does the second law of thermodynamics have to do with global warming? The second law applies to the entire universe, not just the Earth; every time a star fuses two atoms of Hydrogen into Helium, it's contributing to the entropy of the universe.
You're also ignoring the other major combustion product, H2O, which is not a pollution product (I don't consider CO2 a pollutant either, but YMMV). The approximate equation (from Wikipedia) is:
12 12 O2 + C8H18 8 CO2 + 9 H2O
Approx in part because gasoline isn't entire octane, and because there are other biproducts, mostly taken care of in her catalytic converter. Also, if I'd used a fraction in such an equation in chem class, I would have gotten points off, but I guess the point is still clear.
That occurred to me, and I guess a lot of other people. But that is apparently not where the estimate of black matter came from, it came from observations of the rotation of single galaxies. There are posts above about this--look for "rotation."
I'm not sure how you get from 10 to 20, but I know how to get from 10 to 2.
Hint: there are 10 kinds of people in the world, those who understand binary arithmetic, and...you can fill in the rest.
And they're all like Seerlena.
My god, it's full of stars!
We can set upper bounds on most of the unknown variables. So no, it isn't meaningless.
"Assuming the extra 19 galaxies are of equivalent size." They're not, at least not equivalent to the one. Apparently the astronomers think the large nearby galaxies we see near us are the result of mergers of much smaller ones over time. In other words, the old galaxies--those 19--are much smaller (perhaps 1/20th, IIUC).
"...and the Grand Canyon on Earth" Interesting, I hadn't heard that one. A few months ago I was in the Skocjan cave in Slovenia, see pics here: https://travelslovenia.org/sko.... While most caves in limestone are formed by carbonic acid dissolving the rock, and doubtless this one started that way, it looked pretty clear to me that the canyon you see in those pictures was carved by running water in the same way the much larger Grand Canyon was. Do these AU people think the electric discharges went underground?
In what way is it bullshit?
Not much. These are a long time ago in a galaxy far away.
Why not tell the rest of the world (including you) to learn Chinese, or Spanish, or Bangla? That's easy, right?
Not trolling, joking. Controlled nuclear fusion has been ten years off since I was a boy in the 1950s. It's become a trope.
I had a 40 year old electric drill (Oster brand!) that I inherited from my father. It did finally wear out, though, after lots of use. I was kind of glad; it used a cord, and the battery kind is much easier to use.
Which makes me think--maybe this spacecraft just needs a very long extension cord!