Recent content by huyhohoang

Thanks for your answer.

Hi everyone! As we all know standing wave of 2 fixed ends formed by the combination of coming wave and reflection wave. But I wonder why there still have a reflection wave combinating with coming wave to form standing wave of 2 free ends? Many thanks.

Thanks. Now I understand the purpose of the authors.

Hi! I am now building a program to solve integral equation. I have understood the numerical method to solve it as well as others subroutines gauleg, ludcmp, lubksb but when I read this subroutine fred2 below, I don't know exactly the purpose of the author when putting the array omk(i,j) in the...

Hi everybody, I now encounter some problems when try to solve this: Problem statement: Calculate the work done to blow a soap bubble to radius R. Knowing that the process is isotherm, the atmospheric pressure is H, the surface tension is γ. Solution: $$A = A_{1}+A_{2}$$ In which A1 is the work...

Hello everyone! As we've known, the pressure at the bottom of a volume of gas is define by its weight times the height. So I wonder why the atmospheric pressure is equal in all direction? Many thanks

I have known how to solve my equation :) Thanks for your help.

An integral is approximated by $$\int_{a}^{b}f(x)dx=\sum_{i=1}^{n}w_{i}f(x_{i})$$ I am very confused with the weights wi in Nystrom equation. How can I find it?

Thanks for your advice! Would you mind send me some articles or books for more details?

Here my equation $$f(x)=x+\int_{-1}^{1}xyf(y)dy$$ Can you solve it in detail for me? I am an amauteur :) Thank you so much

Hello everyone! I am building set of Fortran code to solve integral equation. I have read "Numerical recipe" and heard about "Nystrom method". But there's no sample problem, I found it difficult to understand. Can anyone explain "Nystrom method" for me with a simple problem? Many thanks

Hello everyone, I still wonder if there's a change in entropy in adiabatic process. The definition of entropy is a quantity represents for the disorder state of a system. Arccording to kinetic theory of gas, temperature is for the state of chaotic motion of molecules. So I'm very confuse, can...