Recent content by eagleswings

not sure if you are still looking but if you are i will try to help. I have to make a presentation on this subject to my laser physics class [graduate level] so I am trying to understand it still myself. The Stark effect is the electric analogue of the Zeeman effect where a spectral line...

Homework Statement in a homework problem we have a spherical dielectric shell with permittivity of 1 [like a vacuum. inside are charges that are released and we have to say what the charge distribution will look like later. if the dielectric can be polarized, i know what the charges will do...

man, i can'te even read that one. it's got symbols i haven't seen used, maybe they are just variables, but unusual ones. maybe i learn that next year! sigh.

yes actually it is e^5x. all the t's that go into the integral have to change to x. but perhaps i can start with what you gave me - thanks!

i have to integrate (ln x)(ln x)/ e^5t [in a variation of parameters problem] and have looked everywhere to see if Ln x multiplied by itself can be shortened to something like ln x^2 or some other reasonable thing but can't find such a rule anywhere. do i have to do this the long way with...

Thanks Dick! sometimes it just helps to be able to ask someone else to look at it.

Homework Statement Show that y(t) = e^t is a solution of y'' - y = 0, Homework Equations integral of e^x dx = e^x +c derivative of e^x = e^x The Attempt at a Solution set m = d(e^t)/dt, which also = e^t then dm = e^t then d(m)/dt = e^t if y(t) = e^t is a solution integrate...

i needed the formula Torque = r cross mg, and i needed to use little g acceleration and not big G gravitational constant. that solves it.

Magnetic plus gravitation solved well i was using the Big G gravitational constant instead of little g acceleration = 9.8 meters/sec

magnetic plus gravitation force Picture i've attached a picture of the problem. i can't figure out how i could be so far off? what element of the problem am i missing?

thanks shooting star!

[SOLVED] Magnetic torque on sphere on inclined plane Homework Statement a nonconducting sphere has mass 80 g and radius 20 cm. a flat, compact coil of wire with 5 turns is wrapped tightly around it, with each turn concentric with the sphere. the sphere is placed on an inclined plane that...

[SOLVED] magnetic plus gravitation force Homework Statement A circuit consists of wires at the top and bottom and identical metal springs in the left and right sides. the upper portion of the circuit is fixed and has a 24 v battery and 12 ohm resistance. the wire at the bottom has a mass...

That would be qw = charge per second. surely not that simple. thanks

We have the same problem. i think i got it. take two capacitors on end, in parallel with each other, so they add, c + c = 2c [they are all the same c]. now the parallel ones become one capacitor of 2c. now take the next two [opposite each other and in parallel], and do the same thing, you...