Hi BillyT: I'm intreged by your fresh water fountain. Why many times? If 500 feet is the limit of osmotic pressure, why wouldn't 5000 feet be...
Hi NO1: A hydrogen car or hybred can look a lot like your baby, and perform about as well. Neil
The problem is solar panels to fill 1% of human energy needs, occupy a lot of costly acreage. Dangling utilizes very low cost space. I think we can...
As far as I know the French Bullet train is the closest to a large scale fast rail gun built to date. Much faster would be necessary to reach GEO or...
A strong ac field demagnetizes, but I think I heard that a moderate ac field can help the very strong dc field get a stronger magnet and/or multiple...
Launching from tall mountains helps. Unpleasent for the humans is the main hold up. Improved robotics may make launch from moutain tops practical by...
In the USA there is lots of idle, but marginal farm land. Think of vegetable oil for fuel as a soil bank, which can be converted to growing food...
I agree; the cost is likely double that of foscil fuel, until about 2012. Dangle gets the panel up high, above distructive children and some of the...
All good answers except blue, violet and indego are the shortest wave length of the visable colors. Dust may play a part, or emitting blue may be a...
A compressor needs lots of energy, otherwise it is a good way to reuse the helium. The world supply of cheap helium is inadequite for lots of...
Here is an interesting paste from the NY times I got from www.able2know.com All that changed last month when Honda handed me the keys to a 2005...
Hi spidergoat: You and Kuntler are partly correct. The present applications for petroleum are not easily filled by alternatives, especially aircraft....
The ribbon will be black so even an alert pilot could crash into the ribbon. The plane would likely be totaled. Any chance the ribbon would be...
I suppose the average bureaucrat would reject "a big methane bubble sank my ship" so they would find a less truthful reason. Perhaps oil platforms...
Hereis a paste from a tread I wrote about a year ago. Post subject: Alternative space elevator Some apparently brilliant people think we can't...
All the comments are good, even the very negative ones. It appears the CNT ribbon will not be strong enough for a starter thread with a cross...
TC is correct. No iron is necessary, but some iron improves the magnet in most applications. Some of the world's strongest magnets use a super...
Trains and other vehicles need a lot of power to accelerate. Then the motor runs inefficently at constant speed. Converting some of the kinetic...
Several programs type for you as you speak. There are some problems requiring tedious corrections, but the programs should improve if lots of people...
Negative resistance is perhaps incorrectly named, but it is a property of some amplifier circuits such as tunnel diodes, some transistors and vacuum...
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