OK, so the car carries the aluminum and the water. The water consists of the hydrogen that will get burned -- that's useful load -- plus the oxygen that will combine with the aluminum.
2 Al + 3 H2O -> Al2O3 + 3 H2, so two atoms of aluminum will remove the oxygen from 3 water molecules and yield 3 H2 molecules. So to get those 3 H2's (molecular weight 2 apiece) you'll need to carry two aluminum atoms (molecular weight 102) and three molecules of water (18 apiece). ((2*102 + 3*18) - 3*2)/(3*2) = 84 pounds of deadweight per pound of useful fuel weight.
And all of that deadweight stays aboard for the entire "tankful" of travel. And by doing the H2 extraction in the car, you deploy gazillions of small converter devices that do it on a retail scale instead of an industrial scale.
Closed system, BFD. The classic hydrogen concept -- electrolyze water, bottle the H2, burn it in an engine -- doesn't care if it's open-cycle because water is fungible.
To implement this system, you'd have to:
(1) Procure a LOT of aluminum.
(2) Extract hydrogen from water.
(3) Bottle and ship the hydrogen.
(4) Burn the hydrogen in car engines.
(5) Ship the aluminum oxide to the extraction plant.
(6) Dissociate the aluminum oxide.
(7) Go to step 2.
For the pre-"breakthrough" concept, just skip steps 1, 5 and 6.
We are pleased to announce that all our new DVDs will be rendered theft-proof by the new on-disk chip enhancement. Thanks to our new ultra-efficient disk manufacturing plant on Guadalcanal, the extra charge for this service will not be more than $1.00 per disk...
Why can't a discarded rocket be locked into a stable orbit around a star instead?
Orbit capture is an extremely improbable event. In a pure two-body situation it can't happen at all: the approaching body will either hit the primary body or zing by it in a hyperbola. Something has to decelerate it during a critical period as it's arriving, and that means there has to be a third body in the right place at the right time. A wandering rocket would have to experience thousands of encounters to have a realistic probability of being captured in one.
What's more, the B-25 was at the end of its planned flight, probably with no more than a couple of hundred gallons aboard.
Incidentally, the reference to "high-octane fuel" is pretty dull-witted. Increasing the octane rating of a fuel has essentially no effect on the energy content or the combustion temperature -- it merely lets you run it in a higher-compression engine, which will put more of the energy into the crankshaft and less out the exhaust pipe. High-octane fire, low-octane fire, same difference.
Income received illegally is taxable income and you are required to report it on Line 21 of Form 1040. If you don't, you go down for tax evasion in addition to whatever you did to get the money.
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Hope to see some Insightful points on parent. If you wanna get metaphorical, DRM is geek flag burning...;-)
rj
No, his next stunt will be running for Congress from a deep red state. Crazy like a fox.
rj
Yes, think you're right on that.
rj
aren't releases required for commercial purposes?
They are required for publication, commercial or not, with certain exceptions such as news events.
Newspapers get releases because they are a business
Newspapers get releases (for non-news pictures) because they publish. And anyway, YouTube is the publisher in this case, and they work for money.
Did the person who taped the Rodney King beating get Mr. King's and the officers' releases? Did the news outlets who obtained the video do the same?
No, because it was a news event and required no releases.
rj
OK, so the car carries the aluminum and the water. The water consists of the hydrogen that will get burned -- that's useful load -- plus the oxygen that will combine with the aluminum.
2 Al + 3 H2O -> Al2O3 + 3 H2, so two atoms of aluminum will remove the oxygen from 3 water molecules and yield 3 H2 molecules. So to get those 3 H2's (molecular weight 2 apiece) you'll need to carry two aluminum atoms (molecular weight 102) and three molecules of water (18 apiece). ((2*102 + 3*18) - 3*2)/(3*2) = 84 pounds of deadweight per pound of useful fuel weight.
And all of that deadweight stays aboard for the entire "tankful" of travel. And by doing the H2 extraction in the car, you deploy gazillions of small converter devices that do it on a retail scale instead of an industrial scale.
rj
To implement this system, you'd have to:
(1) Procure a LOT of aluminum.
(2) Extract hydrogen from water.
(3) Bottle and ship the hydrogen.
(4) Burn the hydrogen in car engines.
(5) Ship the aluminum oxide to the extraction plant.
(6) Dissociate the aluminum oxide.
(7) Go to step 2.
For the pre-"breakthrough" concept, just skip steps 1, 5 and 6.
rj
Not exactly a smoking gun this time, but care to estimate how many people are searching their drives and backups for *.doc right now?
rj
Considering that colleges were teaching FORTRAN about the time he was old enough to drive a car, my mind is not exactly boggled.
rj
I know a few high schools where it would very likely get one of the playactors killed.
rj
rj
We are pleased to announce that all our new DVDs will be rendered theft-proof by the new on-disk chip enhancement. Thanks to our new ultra-efficient disk manufacturing plant on Guadalcanal, the extra charge for this service will not be more than $1.00 per disk...
rj
Hey, at least he didn't say "effects". A guy's entitled to a mulligan for a simple fatfinger.
rj
Orbit capture is an extremely improbable event. In a pure two-body situation it can't happen at all: the approaching body will either hit the primary body or zing by it in a hyperbola. Something has to decelerate it during a critical period as it's arriving, and that means there has to be a third body in the right place at the right time. A wandering rocket would have to experience thousands of encounters to have a realistic probability of being captured in one.
rj
We respect them; we just don't enforce them. That's why Andres Serrano is not in jail.
rj
Ask Jeff Skilling.
rj
Like with 09 f9 11 02 9d 74 e3 5b d8 41 56 c5 63 56 88 c0 on his forehead...
rj
Don't they make ATM machines out of that?
rj
Simple adaptation of this: http://en.wikipedia.org/wiki/Carthago_delenda_est
rj
rj
I think he has hi's possessives right.
rj
TFA says the IRS has agreed to give the filers a mulligan.
rj
What's more, the B-25 was at the end of its planned flight, probably with no more than a couple of hundred gallons aboard.
Incidentally, the reference to "high-octane fuel" is pretty dull-witted. Increasing the octane rating of a fuel has essentially no effect on the energy content or the combustion temperature -- it merely lets you run it in a higher-compression engine, which will put more of the energy into the crankshaft and less out the exhaust pipe. High-octane fire, low-octane fire, same difference.
rj
http://games.slashdot.org/article.pl?sid=07/04/09/ 1417254
rj
It still is...and it's at the forefront of dupes too.
rj
Income received illegally is taxable income and you are required to report it on Line 21 of Form 1040. If you don't, you go down for tax evasion in addition to whatever you did to get the money.
rj