Recent content by PythagoreLove

Thank you that seems to work well. Unfortunately that takes a long time with a lot of sphere and sometimes the program crash because the loop verifying the sphere position run for too much time. I would like to at first take a random position, and if it touches another sphere choose a position...

Hi, I am making a program with the simulation software Breve. It codes in Python or in Steve (their own language). In my simulation, spherical particle with random radius are being spawned at random position into a little zone. My problem is that those particle cannot be superposed. I don't know...

Well, I was writing my solution, and now I get the good answer... no idea what was my mistake. But thank you anyway. PytLov

The question is "what are the reactions" and I gave you the answer of the moment at point A. Maybe the book answer is wrong, it's a book from 1992. But I still don't know if I have the good answer, and I think that hyper static structure is really hard. If someone knows the good answer that...

Homework Statement Calculate the reaction MA http://alkaspace.com/is.php?i=134123&img=E-3.1.jpg Homework Equations The Attempt at a Solution First I have put the reaction By as an hyper static force. Then I found the deflection in B with the force By as a variable. vb=...

I found my error, I used 0.1*L for the area of the falling water but I needed to put it in feet. Thank you very much, you have no idea how much time I passed on that problem. PytLov

I am sorry my sentence was wrong I meant: when I put z=1, my answer is 3.04s. But the answer in the book is 36.5s. I have no idea if my error is at the beginning of the problem or at the end. Please help. PytLov

Homework Statement A long water trough of triangular cross section is formed from two planks as is show in Fig P3.66. A gap of 0.1 in. remains at the junction of the two planks. If the water depth initially was 2 ft, how long a time does it take for the water depth to reduce to 1 ft...

Seems like a wonderful idea and totally worked, that problem was so different from the others I've done in fluid mechanics... I have no idea that I needed to use x(t) in my dT/dt. Thank you Lawrence PytLove

Homework Statement Assume the temperature of the exhaust in an exhaust pipe can be approximated by T=T0(1+ae-bx)[1+c cos(\omegat)] T0=100oC, a=3, b=0.03m-1, c=0.05, \omega=100 rad/s. If the exhaust speed is a constant 3 m/s, determine the time rate of change of temperature of the...

Yes, I know that type of equation, I have seen it in my advanced mathematics class, but we didn't exactly solve them, we we're trying to find the eigenfunctions as an introduction to Fourier series. But if you tell me that Cauchy Euler equation can always be solved with the substitution up...

Thank you for you help, I understand... But I'm really not sure I would think of that in exam. PytLov

Hi, I'm not sure of how to make your substitution. I understand that is u=ln(y), then u'=1/y and u''=-1/u^2 but I don't know how to put it in the ODE... y2*u''+2y*u'-2u PytLove

Hi, I have a problem solving this PDE: (y^2)*u(x,y)''+2*y*u(x,y)'-2*u(x,y) = 0 Every derivate of u is in fonction of y. What I tried: I said that (y^2)*u(x,y)''+2*y*u(x,y)' = (u(x,y)'*y^2)' and make v=u(x,y)'*y^2 then I tried to isolate u(x,y) and I arrive to u(x,y)=-v/y+C(X)...

Sorry I finally got it, I was working on MatLab and I used the function errorbar and a function made by a user called herrorbar for my horizontal