Recent content by ex3mist

Thanks Vidar, I didn't know about the 6 kW per square meter. That gives me some ideas. Maybe that information is better. ;) Can I read more about it somewhere? Can you give a link, please?

@Nugatory: I just want an equation. If there is one... The source is the Sun. The light varies depending on the weather. @Low-Q: I'm not sure about the terms, maybe you're right. I just want to use Sun light and to focus it.

Well, of course the quality of the mirror is very important, but I consider it would be used high quality mirrors. What bothers me most is is there an equation that defines the dependence between the area of the mirror and the amount of light in its focus point? If I want certain amount of...

Hello, I need some information about spherical mirrors that I can't find in internet or this forum. How to calculate the amount of light that is focused in the mirror's focus point depending on the mirror's area and the amount of light emited by the source? If that light is reflected by...

Anyone? I'd appreciate any suggestion!

Hello, I'd like to ask if anyone could give me information or a link to web page where I can find some for the most advanced high speed electric motors used today in cutting machines - speed range, torque and etc. I tried to find searching in Google but I haven't found anything. If someone...

Well, then it should be more correct to call it "armature reaction", I'm not sure. :smile: Whatever, thanks for the explanations, sophiecentaur!

So the delay has an extremely small value! But you compare delay with the speed of light, not the speed of the magnetic field...? Isn't it a lot "slower"? (If the word "slower" is suitable at all... :) )

Well, that means that there is a change in the field. That brings couple more questions: First, could you specify what you mean by "propagation of the change being limited to c"? Please, excuse me for that but I'm not neither a specialist, nor a native english. I couldn't undestand your...

Thanks for the replay berkeman, I suppose you understood my question very well, I mean if the field is not influenced by the speed of the rotation, the inertia or anything else, it is o'kay for me. That's what I want. Just want to make sure that there isn't any law of physics that applies in...

Hello, I'd like to ask how the magnetic field that flows between two magnets would change if we begin to rotate the magnets together? (I hope the image makes my question more clear.) Thanks

Thanks again!

Thanks vk6kro, If I understand you right that means the maximus current of the circuit equals the I1? So, the maximal parameters, if the circuit is loaded to its maximum, would be 3U and 1I, wouldn't it? Which is far less then the parameters if the curcuit is connected parallel or...

What I get at the end is 4.I and 3.U, but as long as I know the power of the circiut equals P=U.I So, in parallel and consecutive circuit P=7.U.I, but in this case P=12.U.I, am I right? What is wrong?

Thanks dlgoff, Really a picture speaks a thousand words. Obviously I've switched the definitions. The mistake is all mine. Anyway, what would be the result in the end if the batteries are connected as it is shown in the image I attached? All of them have the same parameters...