Recent content by Starproj

Thank you for pointing me in the right direction. By following your links and doing a little elbow grease, I have been able to generate an outline of what's what and in what group. I should have been an English major...

Hi, I am in emergency mode! I am enrolled in a 400 level modern physics course, that I thought would be a continuation of the 200-level modern physics required as a sophomore. The prof expects us to be familiar with subatomic particles -- all of them. So far in my education I have only...

Help! I need some clarification on definitions, because it seems like I am getting contradictory information. My textbook defines sidereal time as simply the right ascension that is on the local meridian. It further defines sidereal time as being the RA of a star + the hour angle of the...

Homework Statement Hi, My professor offered the following question: Is it possible to have an electromagnetic field that appears as a purely electric field in one inertial frame and as a purely magnetic field in some other inertial frame? Homework Equations The Attempt at a...

Thank you both for taking the time to answer. It was really helpful. I'm sure you appreciate the difference between getting the answer and understandiing how you got the answer. It took a lot of plowing through it (and some hair-pulling!), but I think I figured it out. Thanks again!

Help! I am losing my mind over this problem (which is basically problem 2.6.5 in Arfken and Weber Mathematical Methods for Physicists, sixth edition). I am having difficulty using the tensor symmetric and antisymmetric relationships of the Riemann-Christoffel tensor to show that it reduces...

I caught the mistake where the limits of integration for theta are 0 to pi, not 2pi. But that doesn't eliminate the integer value of cosine, giving zero. This may be a little above my level, which is why I am so frustrated. I think the book just wanted me to "take their word for it." I...

I am not seeing something, for I get the integral to be zero, not 4pi. I have attached my work - can anyone spot where I am going wrong? Thanks!

Hi, I am studying a section on mass flux and have come across the following integral over an arbitrary surface. I am told that the integral equals 4pi radians. Can someone direct me to a proof of this and explain why the denominator (r2) drops out? Thanks!

Hi, Thanks for replying. I have been looking at this problem from many different angles trying to determine why the prof included the value l. I found a great website that shows a much more complicated problem, but the process is basically the same...

I am studying the problem of two masses, m1 and m2 (not equal) attached by a spring of spring constant k on a frictionless surface set into oscillatory motion (unstretched spring is of length l, x1 < x2). When I first attacked this problem, I let the origin be the center of mass, calculated the...

Hi, You're right. "Totally ignored" are my words. It just seems that as I look through the text and the sample problems, particularly those dealing with electric circuit analogs, there is no consideration of the damping portion. I understand what you are saying about time being large...

Hi, I have been working on the solution to a damped, sinusoidally driven system and their electric-circuit analogs. I can break the equation of motion into the homogeneous and particular portions, and understand that x(t) is the sum of the two solutions. I also understand that the...

Hi, There is definitely overload if you try to look this up online, and you have to pay attention to the dates the sites were made, so I thought I would ask here: What is the latest thinking as to the nature of the universe. Infinite? Finite? Bounded? Unbounded? I am still a...

Thanks for your input - I get it now! I grinded through the math with a few simple trig substitutions and got the answers provided. I appreciate you taking the time to relpy.