Recent content by hmaier

My friend provided me with the teaching materials from a course he took. The assignment of fingers is switched around. B is the middle finger, F thumb and I index finger. As long as it yields the same result, there's no harm done! Thanks a million for guiding me along so generously. I'm really...

ok, so, index finger(particles) on the +x-axis, thumb (magnetic field) on +y-axis, so magnetic force is actually "into the paper", i.e. the positive z-axis? I will need some sort of hand massage after this ;)

my reply got deleted as I wasn't logged in properly... the electric field, like the magnetic force should be perpendicular to the magnetic field. I used your formula blue_leaf77 for the calculations. I think I actually need to use the right hand rule to determine the direction? That gave me a...

Homework Statement beam of protons moving in +x direction at speed v electric field is perpendicular to magnetic field magnetic field in +y direction no deflection What direction/sign has the electric field? Homework Equations not looking for numerical solutions The Attempt at a Solution...

So, I'd could divide by the product of their magnitudes to get the cosine of the angle? Ok, that is straight-forward, thanks! ------- EDIT: Also thanks for clarifying vector displacement vs distance!

ok, dot product would be =Px*Qx + Py*Qy + Pz*Qz using the cartesian coordinates, correct? for c) that would be for P: Sqrt(2^2+3^2) and for Q: SQRT( 4^2+6^2) ? I'll have another look at e) later. Thanks so much this really helped already. I think I have to read up more on unit vectors...

Oh my, right, that was silly. It should be like so, right? sqrt( (Px - Qx)^2 + (Py - Qy)^2 + (Pz - Qz)^2 ) would you please comment on part a) and b) as well? you are so right, WrongMan! Thanks for that. so if I'm not mistaken: c) P: 2m Q: 4m e) With all lenghts of an imaginary triangle...

Hi this isn't my homework, but it is taken from a worksheet for a Maths course(trying to refresh my rusty math), so I hope it fits in here. 1. Homework Statement two cylindrical polar vectors with same origin: P(2,55°,3); Q(4,25°,6) units in m Homework Equations a) Express in cartesian...

Hi all, I'm returning to study on my own terms. I used to know quite a lot of Maths and Physics, but it's all locked away somewhere in my brain. Here's hoping you can help me get it out again :) see you in the forums Herbert