Recent content by itisali

I managed to get Gradshteyn and Ryzhik today. The book is really useful. Now that we have got the formula... \begin{split} \int x X_p(\alpha x) Z_p(\beta x) & = \frac{x}{\alpha^2-\beta^2} \left( \alpha X_{p+1}(\alpha x) Z_p(\beta x) -\beta X_{p}(\alpha x) Z_{p+1}(\beta x) \right) \\...

Thanks a lot! I can now solve the problem. But there is still one more thing left. Is it safe to assume that above integral will be equal to zero in case \int x X_p(\alpha x) Z_q(\beta x) = ? \\ when p\not = q

So, basically, what I am trying to do is the following problem: https://www.physicsforums.com/showthread.php?t=706768

As per orthogonality condition this equation is valid: \int_0^b xJ_0(\lambda_nx)J_0(\lambda_mx)dx = 0 for m\not=n I want to know the outcome of the following: \int_0^b xJ_0(\lambda_nx)Y_0(\lambda_mx)dx = 0 for two cases: m\not=n m=n

Before I integrate, I should have same index for J, i.e. \alpha should be there in both J's. Only that way I can apply orthogonality condition. Please help.

@fzero: This doesn't work because if I put \alpha = 0 then result would become infinity.

Homework Statement I have applied separation of variables to a transient radial heat equation problem. T is a function of r and t. I have reached the following step: Homework Equations T_2(t,r) = \sum_{m=1}^ \infty c_m...

I am not sure but chrome spray is more expensive then using aluminium sheets. I don't know very well how much a new mold would cost. Can you please tell me how much would it cost if I try to make the model as mentioned in my article by using chrome spray and plastic molded parabolic dish. May...

How about visiting my blog. http://hubpages.com/hub/solar-reflector I have presented a dirt cheap way of making a solar concentrator. Its really easy to build. I have tried it myself. It took me approx. 15 minutes to boil water. With good cheap heliostatic controls it can work wonders.

to Tachyon Hey Tach, that may be a very easy and simple and uninteresting thing for you but its a cool fact. Isn't it ;) Ali People do visit my blog: http://hubpages.com/hub/The-energy-responsible-for-our-existence---BINDING-ENERGY That's what we are talking about!

to Tach Ok Tach. You tell me if it hadn't been for the binding energy what would have kept atoms from tearing apart?

to dst: I am talking about the most fundamental "if they weren't there"

Thanks for the response. I have just presented my teacher's idea who is a PhD in Nuclear Physics. I am not trying to belittle you or anyone else. You may as well be a PhD in Physics. I just liked the idea and presented in the form of article.

Hi My teacher told me that its because of binding energy that we and everything around us exist. I have presented this viewpoint in my blog: http://hubpages.com/hub/The-energy-responsible-for-our-existence---BINDING-ENERGY" Please visit it and give comments. If you find mistakes please...