03-20-2008, 06:08 PM | #16 | |||
Gizmologist
Posts: 11,615
Karma: 929550
Join Date: Jan 2006
Location: Republic of Texas Embassy at Jackson, TN
Device: Pocketbook Touch HD3
|
Quote:
Quote:
Besides, the average person knows exponentially less about binary than they do about electricity. Quote:
Of course it's also another point against the 0 1 theory. |
|||
03-20-2008, 07:31 PM | #17 |
Actively passive.
Posts: 2,042
Karma: 478376
Join Date: Feb 2008
Location: US
Device: Sony PRS-505/LC
|
http://en.wikipedia.org/wiki/Power_symbol
and for really interesting reading: http://eetd.lbl.gov/Controls/publica...pubsindex.html A perhaps somewhat depressing personal detail is that no, I didn't need to perform a web search for these... it's come up in my line of work. Last edited by Taylor514ce; 03-20-2008 at 07:37 PM. |
Advert | |
|
03-20-2008, 10:10 PM | #18 |
Technologist
Posts: 488
Karma: 585237
Join Date: Oct 2006
Location: I'm between Cities
Device: SONY Reader PRS-500
|
Am still trying to figure out why tech. manufacturers make such a big deal out of touting that their products are "Peanut Butter FREE." Really, is quality control so bad that not putting delicious smashed nutmeat into a circuit panel is a mark of distinction?!
@ Natch: The way I saw it--once I figured it out--was that the line represented the very simplified circuit line, while the open circle was akin to the little open circuit symbol that looks like a 'c' what's been to France and now puts on airs. |
03-20-2008, 10:11 PM | #19 |
Zealot
Posts: 108
Karma: 112
Join Date: Nov 2007
Device: Kindle
|
For more support for the "1" and "0" view check out:
http://www.historyofthebutton.com/20...sign-by-habit/ http://www.ixda.org/discuss.php?post=26596 |
03-21-2008, 12:23 AM | #20 | |
Grand Sorcerer
Posts: 19,832
Karma: 11844413
Join Date: Jan 2007
Location: Tampa, FL USA
Device: Kindle Touch
|
Quote:
BUt, your right. Isn't that one of the "laws" of physics. "There's no such thing as a free lunch." The could add a compressor to the drive shaft, but it would add extra drag to the engine so it would have to work harder... I bet if you calculate it then it would be a net loss. But, I could see them doing something like hybrid's do today with regenerative braking. Use that inertia to run some compressors to replace some of the air during breaking. I also would want to get a higher speed compressor for my house rather than waiting 4 hours for the thing to fill. But, I guess is it really gets an 850 mile range per "fill" then it should be ok. Or course, I assume the mean full air pressure and petrol. BOb PS: I don't see how it will be "zero" polution either. I guess unless the fuel they talk about using to warm the air is clean burining like natural gas or propane or something... but doesn't combusion give of CO2 by definition? |
|
Advert | |
|
03-21-2008, 03:06 AM | #21 | |
eBook Enthusiast
Posts: 85,544
Karma: 93383043
Join Date: Nov 2006
Location: UK
Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6
|
It's the 2nd law of thermodynamics, which basically says that something like the conversion of the potential energy of compressed air into mechanical energy can never be 100% efficient - there will always be a certain proportion of the energy which is lost in the form of heat.
Quote:
2H2 + O2 -> 2H2O |
|
03-21-2008, 11:31 AM | #22 | |||
Gizmologist
Posts: 11,615
Karma: 929550
Join Date: Jan 2006
Location: Republic of Texas Embassy at Jackson, TN
Device: Pocketbook Touch HD3
|
Thanks for all the links on the power symbol, y'all.
From looking through them, I've concluded that the IEC folks picked something that made sense to them, which may or may not have been based on anything concrete, and other folks have come up with ways to make it make sense to them (such as the binary thing). This conclusion leaves me conveniently free to continue to get irate about it as I please. Quote:
Quote:
Quote:
Of course that leaves aside the question of the pollution generated in compressing the air in the first place, or in generating the electricity to run the compressor. The nit-pickin' version of the claim would be that the car generates no pollution itself, so long as you don't use the on-board ICE to compress more air. That's the 800 pound gorilla in the room of electric car enthusiasts: the electricity has to be generated somewhere, which mostly means fossil fuel burning, and you have energy lost at three points, generation, transmission, and actual use. You can throw storage losses into that bag too. I'm not saying that I think it's less efficient than an ICE, I'm just saying nobody seems to even want to acknowledge that question, let alone answer it. And questions that get ignored like that often turn out to be ones who's answers are at a minimum unpleasant or worse in direct contradiction to the claim being advanced. The longer it goes unaddressed the more I wonder about it. It's like the "'Adding ethanol makes gas burn 10% cleaner!' -- 'But you burn 20% more of it to go the same distance.' -- 'But it burns cleaner!'" thing. I figured out mathematically some years ago that making cleaner burning gas is a losing proposition unless it keeps the same efficiency, or drops more in emissions than it does in efficiency. Work doesn't move closer to home just because you have to burn more gas to get there, and if you burn enough extra gas to more than offset the reduction in emissions, then you have a net increase in emissions. It's high-school algebra. |
|||
03-21-2008, 12:14 PM | #23 | |
Grand Sorcerer
Posts: 19,832
Karma: 11844413
Join Date: Jan 2007
Location: Tampa, FL USA
Device: Kindle Touch
|
Quote:
Anyway... agreed about all the stuff you said about using energy to compress the air. But, one of the shows says it takes about 3 mins to fill the tank at a station which will cost about $2 in electric power... and that will bring you 800 miles. Seems like it still will create less polution. And, if those filling stations use solar/wind to run the compressors then it would truly be 100% zero pollution. Also 100% renewable. BOb |
|
03-21-2008, 12:44 PM | #24 | ||
Gizmologist
Posts: 11,615
Karma: 929550
Join Date: Jan 2006
Location: Republic of Texas Embassy at Jackson, TN
Device: Pocketbook Touch HD3
|
Quote:
Quote:
Solar power for the Air stations would be an excellent idea in some places (I've developed a slowly growing skepticism of wind power, thanks to other discussions here), but I think there'd always have to be a grid connection at least as a back up. I'm pretty interested in the thermionic drive concept. These folks in Gibraltar have come up with a way to convert heat directly to electricity, at about an 80% of ideal efficiency, and it doesn't seem to matter what method you use, so long as it makes heat. They've apparently already taken out a patent on using their chips to power a car, but there hasn't been any significant movement on them for quite some time. |
||
03-21-2008, 01:05 PM | #25 | |
Grand Sorcerer
Posts: 19,832
Karma: 11844413
Join Date: Jan 2007
Location: Tampa, FL USA
Device: Kindle Touch
|
Quote:
http://www.sciam.com/article.cfm?id=...nd-plan&page=1 BOb |
|
03-21-2008, 01:11 PM | #26 | |
Kindlephilia
Posts: 2,017
Karma: 1139255
Join Date: Nov 2007
Location: Snowpacolypse 2010
Device: Too many to count
|
Quote:
Ah yes, Thermodynamics, my most loved/hated course in college. And its successor, Advanced Thermodynamics. The Dean of the Engineering College taught those courses and they were rigorous. |
|
03-21-2008, 01:17 PM | #27 |
eBook Enthusiast
Posts: 85,544
Karma: 93383043
Join Date: Nov 2006
Location: UK
Device: Kindle Oasis 2, iPad Pro 10.5", iPhone 6
|
Not my favourite subject either, I have to confess .
|
03-21-2008, 01:22 PM | #28 | |
Gizmologist
Posts: 11,615
Karma: 929550
Join Date: Jan 2006
Location: Republic of Texas Embassy at Jackson, TN
Device: Pocketbook Touch HD3
|
Quote:
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
NYT: Jeff Bezos: Kindle Books and Readers Are Separate Businesses | sirbruce | News | 31 | 06-17-2009 01:58 PM |
Bezos Interview on Kindle and other Amazon Ventures | daffy4u | News | 13 | 12-10-2008 12:29 PM |
A link to a video of Bezos and Oprah giving a presentation called Kindle Clas | Jason | Amazon Kindle | 2 | 10-26-2008 12:21 AM |
Jeff Bezos at "D": Some Kindle stuff | rmeister0 | News | 21 | 05-29-2008 02:24 PM |
Bezos letter to investors touts Kindle | Daithi | Amazon Kindle | 2 | 04-23-2008 12:30 PM |