Recent content by Odyssey

Homework Statement Consider a gas of 10^6 bosonic atoms at fixed temperature. Can you make an initially classical gas Bose condense by only changing the volume keeping the temperature fixed? Why? Homework Equations condensation temperature of a free Bose gas equation: T =...

Homework Statement Consider 2 fermionic gases, each made of 10^6 atoms occupying 10^-3 m^3 volume: tritium, the nucleus containing one proton and two neutrons, and potassium, 19 protons and 21 neutrons. Which gas do you have to cool more in order for a Fermi surface to form? Find the ratio...

going with the parallel connection idea, k_eq=k_1+k_2 so the natural frequency of oscillation would be omega=sqrt((k_1+k_2)/m))...

hmmm...ok i think the springs are connected in parallel...not too sure...but I am edging to parallel over series...

I think maybe the system is equivalent to the one shown in the attachement here...? I was thinking since the string or rod is massless and rigid...it could be taken out entirely...? The same goes for the pulleys which are massless also...

But hmm...when the mass goes up, both of the springs should be compressed, and when the mass goes down, both springs should be stretched...is it a series connection here?

Hmmm...I asked my prof, he suggested to draw a FBD on it...I guess that would be the mass. I'm going to work on the basis that the length of the string (or wire) doesn't change, and it is massless also (so are the pulleys).

I don't think I can simply treat the two springs combined together in either series or parallel fashion...?

ahhhh...thanks guys! Why didnt I think of that? =\

Homework Statement What is the solution of the equation x*exp(-x)=1? Homework Equations The Attempt at a Solution I tried taking the ln of both sides...and I got ln(x*exp(-x))=ln(1) ln(x)-ln(exp(x))=ln(1) ln(x)-x=ln(1) Then I don't know what to do next...am I on the right...

anyway, I wrote the force equation as (treating down as positive) mg-(k_1)x-(k_2)x=0 mg-(k_1+k_2)x=0 mg-(k_eq)x=0 What should my next step be...?

Homework Statement Determine the natural frequency of the system in the figure (attached). Assume the pulleys are frictionless and are of negligible mass. Homework Equations k_eq=k_1+k_2 (springs connected in parallel) k_eq=(1/k_1)+(1/k_2) (springs connected in series) omega=sqrt(k/m)...

URGENT* Using Lorentz transform to find velocity of rod Homework Statement a person at the origin of an inertial reference frame S observes a rod of proper length l moving towards him at a speed v. He notes that the rod takes a time T to pass him. Assuing that when the front end of the rod...

Thanks guys. It was very clear. Now I get the problem! :)

How to get inverse Lorentz tranformation from "direct" Lorentz transformation Hello, I am having trouble on deriving the inverse Lorentz transformation from the direct Lorentz transformation. I looked at some threads here and I found in here...