Recent content by tsuwal

Hi Tosh5457, I sent you a PM so we don't go offtopic here. I am studying at IST, Lisbon (I think it's written on my profile).. Lisab, I bet you are a marine biologist/physicist. Gastronomically speaking my favorite fish is cod, but the ones that I like the most and whish they were in the...

oh sorry about it, I didn't knew it was impolite to bump in my own thread. I've been using the forum for about one year to help me in my study. Now that I am on vacation and have some free time, I would like to do a sort of cultural scientific exchange. Anyway, the invitation is still up to...

Yes I know but the point is to meet students from other universities :)

Come on, why nobody has answered me yet with 190 views? Don't you want to connect with other people that have the same interests as you?

Hi everyone. I am using some of my summer free time to learn about new subjects in Edx, Coursera, watching TED talks, reading some interesting books to refresh my mind and trying to have some fun too. I would like to meet people like me that like that are curious and like to learn. I'm thinking...

nodes are located at the extremeties, so using my variables 2(h-L)/n But i don't know if experimentally this can be verified...

yes. the cylinder is closed at the top

if we made a simplification like just assmuning the vibration of the air, could qe solve it?

Homework Statement We have high cilinder with height h a filled with water up to the height L<h and air in the rest. We hit the cylinder and listen to the frequency of its sound. How can we determine L in function of h, the frequency of the noise, the speed of sound, ... Homework...

I am finishing a course on Eletromagnetism and Optics. I am currently a physics student in the second year of university. I passed the final exam and now I'm supposed to do a work on fiber optics. Do you know any interesting problem that i could adress? It can be a hard one, I am supposed to...

yeah right, did a mistake on the limits of integration of the v variable. I calculated the limiting points of the triangle in the uv plane and did a mistake in one point. Limits of v became v=u and v=1. This way was impossible. Thanks but I think you did a mistake on the Jacobian. It is 1/2 not 2.

Homework Statement Let D=\{ (x,y)\in\mathbb{R}^2:x+y< 1;0< y< x\} calculate \int_{D} e^{-(x+y)^4}(x^2-y^2) through an appropriate change of variables Homework Equations \int_{D} f *dxdy=\int_{D} f*Jacobian*dudv The Attempt at a Solution I've tried x+y=u and x-y=v...

I just bought a eletric tool kit and this thing came with it: I think they are called test hooks but i just can't figure out what are they for.. I can't find nothing that connects to the top hole of that thing.

I've just finished a course on Mechanics on my university and wish to apply that knowledge to learn more about rockets, missiles, firearms.. projectiles in general. Do you know any good book about the subject. How do missiles work? Why was the first ballistic missile ever invented only in WW2...

The bomb kills everything around it so i was wondering if the people who shot the bomb where safe or even if the pilots health was affected by the bomb..