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Comment: Re:Answer, in brief: (Score 1) 556

by Hank the Lion (#38712306) Attached to: Can NASA Warm Cold Fusion?

Automobiles produce carbon monoxide, various nitreous compounds, and minimal water.

HUH??? Automobiles burn mainly alkanes, which are composed of carbon and hydrogen.
When you burn those, you get carbon dioxide and water.
So why you claim that automobiles produce minimal water is a mystery to me.
Most water that is produced will be in vapour form, so you don't see it, but it's there, nevertheless.

Comment: Re:also needed for houses (Score 1) 462

by Hank the Lion (#38224872) Attached to: Are Data Centers Finally Ready For DC Power?

Voltage drop across a white LED is 3-4 V. Who ever heard of germanium LEDs with 0.8V drop?
And if you have a power LED used for lighting, you don't use a resistor to limit the current; you use a small switchmode power supply.
If you design a good one, you can have electrical efficiency of >90% running from 12V, wasting less than 10%.

Comment: Re:...the fuck? (Score 1) 113

Ok, here we go again:

LHCb sees where the antimatter's gone
ALICE looks at collisions of lead ions
CMS and ATLAS are two of a kind
They're looking for whatever new particles they can find
The LHC accelerates the protons and the lead
And the things that it discovers will rock you in the head.

Or, for the full version: http://www.youtube.com/watch?v=j50ZssEojtM

Comment: Re:You mean... (Score 1) 383

by Hank the Lion (#38036096) Attached to: Firefox 8.0 Released

Whatever it is, I got a prompt saying that an extension that I want to use would be disabled if I upgraded to 8.

Would it be disabled because it is incompatible, or because you did not install it yourself?
In the latter case, you can just enable the checkmark before it, and continue using it.
Many programs install, if you don't pay attention, extensions that you may not be totally happy with ('Ask'-toolbar, anyone?)
Firefox now disables these by default, but gives you the option to keep them enabled if you want them.
I find this a useful feature.
On the other hand, there may be extensions that refuse to load after a major version number change, That is a pain, but in many cases, this will be remedied quickly.

Comment: Re:Yet not one will make a hot seller.... (Score 1) 119

by Hank the Lion (#37885000) Attached to: Is That an Android On Your Wrist?

A double din android car stereo

Hey, yours is the second one I heard of!
A friend of mine made one too for his car.
Took a standard cradle, which has just about the right size, and mounted it over the double-din car stereo slot.
He had one problem, if I remember correctly.
When you put the Droid tablet into the cradle, I think you could either charge, or have sound output, or something like that.
Stupid limitation by Samsung who had not foreseen creative uses of their product.
I don't think it took him a week to make, however.

Comment: Re:nonsense (Score 1) 315

by Hank the Lion (#34155464) Attached to: Going Faster Than the Wind In a Wind-Powered Cart

A claim like this requires some explanation of how it could be done, and such an explanation is obviously missing from the article. You shouldn't try to make up explanations for them (although that is how this nonsense continues to thrive).

Or to put it another way, if this thing can go through the point where it is going at the speed of the wind to then go faster than the wind the, assuming that it isn't storing energy from some time in the past and that the wind doesn't slow down, then it could also sit in zero mph wind and start going forward all by itself, just powered by a zero mph (non-existent) wind. Perhaps you believe that. I don't.

Parent has been moderated "Troll" but I think he is sincere.
And, at first, I did not believe this to be possible either.
I now understand how it works.

The propellor is used as a sail.
As long as there is pressue on the back of the 'sail' it can accelerate the cart.
If the sail were fixed w.r.t. the cart, it would stop receiving back pressure as soon as you reach wind speed. When you pass wind speed, you would get wind pressure from the front, and you would slow down.
So, what do they do: they drive the propellor from the wheels, so the surface of the propellor gets a forward speed that is lower than the forward speed of the cart itself.
In that way, even when the cart itself has passed wind speed, the surface of the propellor hasn't, and the wind can keep pushing the propellor forward, and thus, the cart.
The cart itself will feel the wind coming from the front, but the surface of the propellor, because it is turning, will still feel the wind force from the back.

Then a last question remains: will this force on the back of the propellor be greater than the force in the opposite direction on the wheels (that causes the turning of the propellor)?
This depends on the gear ratio. If you choose the gear ratio 'wrong' you will create a cart that will propel itself against the wind instead of along with it.
Notice that this is something that has been done earlier many times.

If it would be stationary, it would get close to wind speed, but never be able to pass it.
But the propellor is being driven by the wheels.
This gives the surface of the propellor blades a speed forward (wrt the ground) that is lower than the wind speed, even when the cart itself is already above wind speed.
In this way, the wind can still exert a forward force on the blades, and thus propel the cart.

Comment: Re:So... (Score 1) 284

by Hank the Lion (#33055926) Attached to: Long In Development, Toshiba 'SCiB' Battery Debuts

That would make the total energy 30 kW * 4 h = 120 kW * h, not 120 kW / h.
The units are multiplied / divided the same way as the numbers.
If you would have a power that was linearly increasing from zero to 30 kW in 15 minutes, then you would have an increase of 30 kW / 0.25h, or 120 kW/h.
As you see, the unit kilowatt per hour is rarely encountered.
When you speak of energy, you have kilowatthours, not kilowatts per hour.

To understand a program you must become both the machine and the program.

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