dunno.. I think knitting needles, wire brish on a drill, soldering iron.. all worse than being instantly vaporised in a split second (imo)
Staring at the screen can get pretty bad at times too (goatse)
Yeah sorry, I forgot to mention that you would need a system that would discharge only one at a time, with a smooth transition between them. I had thought of that.
However, I had not thought of this.. having one small cell delivering the power at any given time will be harder to do as the loading on the cells would be higher than if the load was spread between all of them. Maybe that wont be a prob, maybe it will.
And yeah I would definately be one of the slow takers for something like this.. I wouldnt trust the system for some time...
Well I assume that if such a system became widespread, it should be fairly foolproof.
Rather than having huge heavy droppable battery units that would be in various states of charge, how about multiple smaller units that could be swapped out. Each battery-unit could have self checking of condition with an easy to read display. The charging stations could condition and recharge each cell easily and identify duff cells for manufacturer replacement.
Scenario1: With OneBigBattery(tm) You have a long drive to do and you need a full battery for it, but you only have half a charge left... you pull into the next Duracell station and ask for a full battery.. The people/machines heave out your old battery even though its half full and put it on the conveyor mechanism that takes it to its charging station while giving you a fresh full battery that gets heaved back into your car, denting the paintwork on the way cos a guy slipped while holding the over-heavy battery.
Congrats! you have just bought half a battery's worth of power for the price of a full battery. OK, maybe they can refund you based on the remaining charge in the old battery, but they would really need to discharge it (re-using the power I hope) to know how much you had left. Maybe they could credit your account for next time. The station would maybe have to do a full discharge/recharge or other stuff to check and maintain the battery's condition.
You have no option of carrying a spare battery, they are too big...
Scenario2: With TenSmallBatteries(tm) You have a long drive to do and you need a full battery for it, but you only have half a charge left... you pull into the next Duracell station and ask for a top up. The guy (or you!) opens the battery access panel and sees 5 clean simple modular units with green lights on and 4 with red on. One in the middle has amber. You whip out the ones with red lights - they are heavy, but no worse than say a full spare fuel can*. You pop the dead ones with red ligfhts into the machine next to you and it gives you back a charged one with a green light on. Repeat for the remaining red ones.
If you like, you can swap out the amber one too that is only partially charged, I think they might be able to credit you like in scenario 1. These smaller cells will be cheaper to replace in the event of faulty manufacturing (1 cell goes, replace it, rather than replacing the WHOLE bank of cells). These cells will be easier to discharge, condition, check condition of, recharge, handle etc.
You can keep a spare or two in your boot (trunk) as they are not prohibitively huge.
I dunno.. I think a lot of the ptroblems being banded about are easily overcome.. i have not paid any detail to quantities and sizes of cells in my little scenarios, just giving a basic idea.. There would be a *lot* of groundwork.. setting up the cars and setting up the stations, but I think technically and people wise, it would be entirely do-able...
have more air pressure being blown in than being sucked out.
i.e. have more fans blowing in than sucking out.. or have all fans blow in... Obviously would need some planning to ensure that the air from the hot areas (cpu, psu, gpu)would find an easy exit.
Say for instance you are in an internet cafe such as "easy internet" I do not know about their CD ROM policies, but one thing I do know is that the machine gets a fresh OS image on every reboot.
Real vehicles on the pavement? huh??
I often cycle on the pavement, but thats to get away from cars. I only thought people drive on the pavement in action movies.
I just tried a little office physics to see how strong these caps are...
take a small flat non-deformable round thing.... r = 0.5cm
Area = pi*r*r = pi * 0.25 =0.785 square cm
I weigh 75 KG which converts(google)to approx 165lb 165lb spread over 0.785square cm =210lb/square cm
Convert(google) square cm to square inches
=210lb/0.155sq in =1354lb/sq in
1354 psi
So if I stand on a 1cm* diameter 'thing' I am exerting 1354 psi on whatever is underneath it, which is, in this case a bonaqua bottle top very similar to the bottletops I used before. Its not deforming much at all, just a slight indentation where the small object was touching it.
OK, the direction I am pressing on it is opposite to the direction the gas would be pushing on it, but I doubt that would make much difference, stronger in the correct direction if anything...
* the thing I was standing on is actually much smaller than 1 square cm... So the pressure would be higher...
From direct experience, the bottle tops and necks are the only bit that actually survive the explosion (yes, we did this many, many times).
The reason I posted in the first place was due to my surprise of the pressure required for liquid CO2 being so high. I never imagined it could get up near the 870 mark. Maybe they hadnt gotten all the way to that pressure when they explode. Maybe the pressure required is much less when the temperature is down at -50+ or whatever it would have been (this seems likely).
It was painfully obvious at the time, however, that the pressure was pretty damned high.
I had a google to see if anyone has tested the exploding pressure of various plastic bottles but couldnt find anything.. Would be interesting...
If I released the pressure, and made dry ice from the liquid, then started again, the same happens. The dry ice, again, turns to liquid CO2 and goes back to dry ice again when you release the pressure again.
Also, how would you account for the small amount of water vapour in the air turning into half a coke bottle of full frozen water ice? The dry ice is pure, if you leave it to sublime in the coke bottle with no lid on, there is no water residue.
0.5l coke bottle... Half fill it with pure dry ice pellets Agitate. For a while, yes, the CO2 sublimes. After an inexact amount of time (dependent upon how quickly you heated it), the pressure gets to a level where the CO2 begins to melt rather than sublime. The CO2 keeps melting until you have a coke bottle half full of a "liquid" (still VERY cold). At this point it is near impossible to deform the walls of the bottle as the pressure is so high (on the one that went in my hand, the 'ribs' of the 0.5l coke bottle had all but gone as it was stretched out from the pressure.. just prior to exploding as I threw it from my hand) IF you slowly (or quickly lol) release the pressure on the cap, that liquid turns back into dry ice. How can the liquid have been anything other than CO2? Water cannot turn to dry ice.
I dont think the small amount of water vapour in the air is gonna turn to half a bottle of water.. That would be very clever science indeed.
Also, when you release the lid of the bottle full of the "liquid", it turns back into dry ice. If the CO2 had sublimed, the gas would have escaped when I removed the lid and there would have been no CO2 in there so no dry ice.
If the liquid was water, it wouldnt turn into dry ice when releasing the pressure (duh).
ok, so what liquid was the pure dry ice (and a tiny amount of air) turning into, and where did the CO2 go?
Dude, it was liquid CO2.. there is no question of that.
Explain to me an alternative...
870psi!!!
Thats scares me, because... When I was a bit younger (not too much mind) I used to put dry ice into plastic coke bottles and agitate them until the CO2 became a liquid.. so that was some intense PSI'age in those coke bottles.
I guess its hardly surprising that one exploded in my hand once (with water in there too as a temperature accelerant )and broke my thumb:)
... when taken in context with the news from MS about its new MSN Search service indexing more pages than any other rival.
http://news.bbc.co.uk/1/hi/technology/4000015.stm
I guess Google had to do this to debunk MS' claims of being the new leader in amount of pages indexed.
Slashdot Mirror
Oh wait, no.. that was T-43 not T42. My bad!
Terminology, there are 2 versions of "backwards" here... One is backwards for the helicopter, the other is backwards for the blade itself.
In normal flight, the retreating blade is going backwards when its going forwards (hence retreating)
So with this, the tip is still and the rotor is still travelling forwards with the helicopter, but backwards relative to itself and its aerofoil.
Thats how they should have done it... rather than having a pro morse key where they can tap out those codes at scarily fast speeds...
Would be interesting to see the test done again like that.
Are you implying then that attatching a huge professional morse key to a phone *is* a great idea??
Bloody hell.. Just posting this to see how hard this "prove you are not a script" thing is as I havent seen it yet.
Pretty non-trivial to glance and read.. almost tricky even when trying.. x y m umm.. i?? e.. a i think and w (or v, not sure)
dunno.. I think knitting needles, wire brish on a drill, soldering iron.. all worse than being instantly vaporised in a split second (imo) Staring at the screen can get pretty bad at times too (goatse)
Yeah sorry, I forgot to mention that you would need a system that would discharge only one at a time, with a smooth transition between them. I had thought of that. However, I had not thought of this.. having one small cell delivering the power at any given time will be harder to do as the loading on the cells would be higher than if the load was spread between all of them. Maybe that wont be a prob, maybe it will. And yeah I would definately be one of the slow takers for something like this.. I wouldnt trust the system for some time...
Well I assume that if such a system became widespread, it should be fairly foolproof.
Rather than having huge heavy droppable battery units that would be in various states of charge, how about multiple smaller units that could be swapped out. Each battery-unit could have self checking of condition with an easy to read display.
The charging stations could condition and recharge each cell easily and identify duff cells for manufacturer replacement.
Scenario1: With OneBigBattery(tm)
You have a long drive to do and you need a full battery for it, but you only have half a charge left... you pull into the next Duracell station and ask for a full battery.. The people/machines heave out your old battery even though its half full and put it on the conveyor mechanism that takes it to its charging station while giving you a fresh full battery that gets heaved back into your car, denting the paintwork on the way cos a guy slipped while holding the over-heavy battery.
Congrats! you have just bought half a battery's worth of power for the price of a full battery. OK, maybe they can refund you based on the remaining charge in the old battery, but they would really need to discharge it (re-using the power I hope) to know how much you had left. Maybe they could credit your account for next time. The station would maybe have to do a full discharge/recharge or other stuff to check and maintain the battery's condition.
You have no option of carrying a spare battery, they are too big...
Scenario2: With TenSmallBatteries(tm)
You have a long drive to do and you need a full battery for it, but you only have half a charge left... you pull into the next Duracell station and ask for a top up. The guy (or you!) opens the battery access panel and sees 5 clean simple modular units with green lights on and 4 with red on. One in the middle has amber. You whip out the ones with red lights - they are heavy, but no worse than say a full spare fuel can*. You pop the dead ones with red ligfhts into the machine next to you and it gives you back a charged one with a green light on. Repeat for the remaining red ones.
If you like, you can swap out the amber one too that is only partially charged, I think they might be able to credit you like in scenario 1. These smaller cells will be cheaper to replace in the event of faulty manufacturing (1 cell goes, replace it, rather than replacing the WHOLE bank of cells). These cells will be easier to discharge, condition, check condition of, recharge, handle etc.
You can keep a spare or two in your boot (trunk) as they are not prohibitively huge.
I dunno.. I think a lot of the ptroblems being banded about are easily overcome.. i have not paid any detail to quantities and sizes of cells in my little scenarios, just giving a basic idea.. There would be a *lot* of groundwork.. setting up the cars and setting up the stations, but I think technically and people wise, it would be entirely do-able...
"So Long"
have more air pressure being blown in than being sucked out. i.e. have more fans blowing in than sucking out.. or have all fans blow in... Obviously would need some planning to ensure that the air from the hot areas (cpu, psu, gpu)would find an easy exit.
Say for instance you are in an internet cafe such as "easy internet" I do not know about their CD ROM policies, but one thing I do know is that the machine gets a fresh OS image on every reboot.
Real vehicles on the pavement? huh?? I often cycle on the pavement, but thats to get away from cars. I only thought people drive on the pavement in action movies.
The movie?
This isn't HHGTG you know
Hmm it worked for you... Given that, I agree too!
Found some water rocket hobbyist sites... They use PET bottles too...
h tm
This guy has modified 2 bottles, back to back, thus introducing weaknesses in the structural integrity of them...
"My rockets repeatedly withstand 140 psi of air pressure!"
http://www.outsideconnection.com/rockets/default.
I just tried a little office physics to see how strong these caps are...
take a small flat non-deformable round thing....
r = 0.5cm
Area = pi*r*r
= pi * 0.25
=0.785 square cm
I weigh 75 KG which converts(google)to approx 165lb
165lb spread over 0.785square cm
=210lb/square cm
Convert(google) square cm to square inches
=210lb/0.155sq in
=1354lb/sq in
1354 psi
So if I stand on a 1cm* diameter 'thing' I am exerting 1354 psi on whatever is underneath it, which is, in this case a bonaqua bottle top very similar to the bottletops I used before. Its not deforming much at all, just a slight indentation where the small object was touching it.
OK, the direction I am pressing on it is opposite to the direction the gas would be pushing on it, but I doubt that would make much difference, stronger in the correct direction if anything...
* the thing I was standing on is actually much smaller than 1 square cm... So the pressure would be higher...
From direct experience, the bottle tops and necks are the only bit that actually survive the explosion (yes, we did this many, many times).
The reason I posted in the first place was due to my surprise of the pressure required for liquid CO2 being so high. I never imagined it could get up near the 870 mark. Maybe they hadnt gotten all the way to that pressure when they explode. Maybe the pressure required is much less when the temperature is down at -50+ or whatever it would have been (this seems likely).
It was painfully obvious at the time, however, that the pressure was pretty damned high.
I had a google to see if anyone has tested the exploding pressure of various plastic bottles but couldnt find anything.. Would be interesting...
If I released the pressure, and made dry ice from the liquid, then started again, the same happens. The dry ice, again, turns to liquid CO2 and goes back to dry ice again when you release the pressure again. Also, how would you account for the small amount of water vapour in the air turning into half a coke bottle of full frozen water ice? The dry ice is pure, if you leave it to sublime in the coke bottle with no lid on, there is no water residue.
OK...
0.5l coke bottle...
Half fill it with pure dry ice pellets
Agitate.
For a while, yes, the CO2 sublimes.
After an inexact amount of time (dependent upon how quickly you heated it), the pressure gets to a level where the CO2 begins to melt rather than sublime.
The CO2 keeps melting until you have a coke bottle half full of a "liquid" (still VERY cold). At this point it is near impossible to deform the walls of the bottle as the pressure is so high (on the one that went in my hand, the 'ribs' of the 0.5l coke bottle had all but gone as it was stretched out from the pressure.. just prior to exploding as I threw it from my hand)
IF you slowly (or quickly lol) release the pressure on the cap, that liquid turns back into dry ice. How can the liquid have been anything other than CO2? Water cannot turn to dry ice.
I dont think the small amount of water vapour in the air is gonna turn to half a bottle of water.. That would be very clever science indeed. Also, when you release the lid of the bottle full of the "liquid", it turns back into dry ice. If the CO2 had sublimed, the gas would have escaped when I removed the lid and there would have been no CO2 in there so no dry ice. If the liquid was water, it wouldnt turn into dry ice when releasing the pressure (duh).
ok, so what liquid was the pure dry ice (and a tiny amount of air) turning into, and where did the CO2 go? Dude, it was liquid CO2.. there is no question of that. Explain to me an alternative...
870psi!!! Thats scares me, because... When I was a bit younger (not too much mind) I used to put dry ice into plastic coke bottles and agitate them until the CO2 became a liquid.. so that was some intense PSI'age in those coke bottles. I guess its hardly surprising that one exploded in my hand once (with water in there too as a temperature accelerant )and broke my thumb :)
... when taken in context with the news from MS about its new MSN Search service indexing more pages than any other rival. http://news.bbc.co.uk/1/hi/technology/4000015.stm I guess Google had to do this to debunk MS' claims of being the new leader in amount of pages indexed.
mmmm juppleberry
I would assume that the coating is only for the side that is read.. not for the label side...