Recent content by rafeh1

the quotes are of a nobel laureate not mine. If you would like to dispute Andrei Geim's physics credentials feel free. I think the implication this discovery is leading to is specific charged particles can be filtered thus leading to a charged circuit if a one way trap door can be created out...

well not according to Nobel laurate who invented graphene and is author of the paper. they seem more authoritative than anonymous internet comments “In the atmosphere there is a certain amount of hydrogen and this hydrogen will end up on the other side [of graphene] in a reservoir. Then you can...

Researchers from the University of Manchester were surprised to find that positively charged hydrogen atoms - protons - can pass through it http://www.independent.co.uk/news/science/scientists-predict-green-energy-revolution-after-incredible-new-graphene-discoveries-9885425.html Does that mean...

For interstellar travel the amount of energy needed is only available from nuclear power

At 0.1c, Orion thermonuclear starships would require a flight time of at least 44 years to reach Alpha Centauri, not counting time needed to reach that speed (about 36 days at constant acceleration of 1g or 9.8 m/s2). At 0.1c, an Orion starship would require 100 years to travel 10 light years...

Look at freeman Dysons work on a fusion powered ship to alpha centauri that would go at .03c with 1g thrust for 10 days.. This was a do able project using 1958 tech. It is eminently do able now. http://en.wikipedia.org/wiki/Project_Orion_%28nuclear_propulsion%29 Instead of building a 100,000...

why don't you look at the new NASA quantum engine. where you don't have to carry your momentum mass on the ship http://en.wikipedia.org/wiki/Quantum_vacuum_plasma_thruster

In the ebike and evs the application is to measure power vs time so need both current and voltage. Normally people put a low res resistor in series to measure current. It is preferable not to break into the power cable and keep it sealed. In bigger evs like Nissan leaf you have 390v prime power...

The sensor is non invasive for current. It uses a hall effect. It would be really cool if i could come up with some solution for measuring voltage at the same time. Never having to physically connect or touch high voltage /high current power lines.

Not really the charges needed to keep the black hole in place would be mostly static. The black hole would get energy from capturing forward particles. Energy would be extracted by gravitational expulsion of part of the fron that was captured. The black hole system could be configured in such...

consider trying rocky and Bullwinkles magic mysterious material upsydaisium. A material with negative mass that falls up. If you combine a device with negative and positive mass materials such that net mass is 0 like your cube. BTW Net mass 0 can travel at c without violating comrade einstein...

Since you are speculating why not a electrically charged pair of black holes that spin around each other generating a near Earth gravitational field for the spaceship and a protective magnetic shield that deflects ionizing radiation. Since the micro black holes are charged then a charge plate...

In the process of building my ebike I came across problems of measuring current without putting a sense resistor in the power circuit. For that we build a USB based non invasive current sensor which measures current from -100A to +100A. We also did a kickstarter although It looks like not many...

Hi I am an ee and I build my own ebikes. latest build is 40C3 (40 cubed) an ebike that goes 40 mph, weighs 40 lbs and has a range of 40 miles. google 40c3 rafe