Recent content by evelyncanarvon

Oh ok. I think that might be it. I'll look at connecting them manually. Thanks a lot!

Woah--sorry, I'm afraid I don't know what you mean. I haven't ever fiddled with any of the equations they gave me. Should I have? I am quite new at this--up to this point I've just been creating the objects and choosing properties for them from a list of options in the subdomain and boundary...

I basically just set up a beam (a rectangle) with the left side fixed into place, and a plate (a fixed line) underneath it, and I set up a voltage difference between the two. This produces an electric field between them, but that field does not bend down the beam. I don't know why this is: in...

Hey-- I'm trying to model the bending of a beam due to electrostatic forces. (Femlab does offer this model on their website, but the module I'd need to run it costs $600!) I have no problem modeling a beam bending, and I have no problem creating a parallel plate capacitor, but when I...

You don't need to use mass for the first part, but for the second. You divide the force by the mass to get its acceleration and then you use one of the thee kinematic equations to find v final using the distance traveled and the acceleration.

Thanks for your help! :smile:

Okay, Tide, I kinda get what you're saying. dp/dt = qvB p= mv/(1-v^2/c^2)^1/2 but how do you translate these to make them equal each other? How do you transform the second equation to become a variation of mv^2/r ? If you have to take its derivative, it'll get really ugly...

Hmmm... I still don't totally understand. Here's what I have so far. Not taking into account relativity, the mass of the electron measured by the spectrometer will equal B^2*e*R/E where B is the magnetic field, e is the charge of the electron, R is the radius of the circle it travels...

Thanks for your prompt reply! So the distance they travel would change? Would it just be multiplied by the lorentz factor? I'm still a little confused.

Hi, I had a homework question in my physics class that I'm not totally sure about. We're supposed to design (not actually build, just explain on paper) a mass spectrometer that can measure the speed of electrons going at .998c, so taking into account special relativity. Here are my questions...

um... yeah, it can be. You'll understand when you're older, veryyoung :smile:

Hi, I had a homework question in my physics class that I'm not totally sure about. We're supposed to design (not actually build, just explain on paper) a mass spectrometer that can measure the speed of electrons going at .998c, so taking into account special relativity. Here are my questions...

Hi, this isn't really a physics question, more a question about physics, if that makes sense. :smile: If I major in physics, could I eventually go into a career in robotics? What would I need to do? Thanks.