Recent content by Lillensassi

What is a Gaussian shell? Don't the Gaussian surfaces have to be closed?

Homework Statement We have two half-spherical electrodes, arranged so that they produce a spherically symmetric electric field. What is the magnitude of the electrical force on an electron between the two electrods? Specifications: Distance between electrodes: d=0.04 m Radius for first...

Thank you! Looks like the problem is lack of knowledge of multivariable calculus from my part. Thank you for pointing me in the right direction - sometimes asking the right questions can be as hard as finding the right answer!

I'm reading about the Principle of Least Action. As a prelude to it, we look at the functional J(x)=\int f(y(x),y'(x);x) dx where the limits of integration are x_1 and x_2. We want to find the function y(x) that gives the functional an extremum. Now, to do this, we write any possible function...

Have you considered ALL the forces working on the object? Make sure For something to hang from a spring, what force is required?