Recent content by Andrea

hello, I'm not sure if i understand this correctly. does it mean that the outer layers of atmosphere move at the same speed as the layers close to the Earth's surface? thanks for help with this one :-x (and I'm aware of ancientness of this thread, but only because you talked about it earlier - i...

hello, here is my second message.(and my English is still very bad) I don't understand these 3 little experiments(we need Helmholtz coils and a Hall Effect probe) I know I have to draw a graph for each situation but I can't interpret the difference between the theory and the experiment...

... Thank you... Concretely,I need to solve the questions and I'm not a genius in arithmetic :biggrin: So I have understood the principle but It seemed to be developed. "From this expression,how could you deduce the magnetic field on any point of this axis of an Helmholtz assembly.You have to...

Hello everybody and thanks so much for your help, (I know I have to improve my English) here is my big problem concerning 3 formula's : (It's just the beginning) -first at all,we have a magnetic field B created by the circulation of a current I into a spire (with a spoke a) on a point at a...