Как нужно поступить, чтобы электроскопы после отведения палочки оставались заряженными? Какого знака заряд будет в этом случае у обоих электроскопов

- Oh, come on! Every time I'm asking you a question, you burst into laughter...

- Maybe, you should ask something truly interesting and not less serious?

- Hmm, let me think a little... What about mankind? I mean its history of evolution. 

- Anything about knowledge, yea?

- Quite right! Let the exciting talk be today, my friend.

- All right. Let's start with the meaning of this word. Knowledge - what is it? It's a complex of all the things and cases which we could meet or live through during our living in this world, isn't it?

- Yeah, I think so. And it also helps us a lot to make our life better and easier.

- Sure. And what about the appearance of desire to get to know to anything which can be seen or felt by people?

- I suggest, our mind makes us obey its manifestations. So... Why are you looking at me in that way?

- Oh, sorry, sorry... Proceed speaking please. 

- So... Maybe an ability to think leads the way to the progress. I've thought a lot about it. Different kinds of machines, technology. Discoveries in medicine and so on...

- Isn't it incrediable?

- Pardon?

- I'm talking about our development. Look, if one wants to discover something new, he must study as much as he can. And also improve everything which connected with his mind.

By learning during all the life we can make better something not only in our own lives but almost everything in the others' ones.

- I think you're right. It doesn't depend on the age of a concrete person. There is no such important thing as an unbroken education. And it's always very cool to learn something new, from my point of view.

- Certainly. Learning is lifelong...