Hello Experts! When my mother passed away I was given the wall clock that she has had in her home since I was a small child. I don't care about how much it costs because I will never sell it. What I would like to know is how I can find out information about the clock. It is a chiming wall...

Hey does anyone know how to use a pendulum. I want to learn how to use it. And is it for real ? Thanks 3960

I have two second order differential equations that describes a double pendulum system: y'' = g(y-y)/a y'' = 2g(y-y)/b I tried in mathematica DSolve == g(y-y)/a,y'' == 2g(y-y)/b},{y,y},x,w] but it didn't work. Can Mathematica actually solve that? I looked through the equation...

I would like to know why the string separation (in a bifilar pendulum) is inversely proportional to T (peridoc time) If anyone could help that would be great!