Recent content by Poseidonho

Thanks, by the way do we can equal the magnetic force to mechanical force?

For the rail gun, the magnetic field on rail do not play any role, Right?

What is the physics behind coil gun. For the magnetic field part, that is convert a electric voltage to the magnetic field. How the magnetic field related to the voltage? Is there any equation for the conversion the voltage to the magnetic field, maxwell or others? After that, the...

Ya, I also interested in the equation for the shape of balloon, pressure, height, temperature and gas density (AIR). If can involve in Vector is better. But so far what I found is just a simple equation, the ideal gas law related it.

Thank You very much, I understand d

I live in Malaysia and I had a lot of interest to study physics and become a physicist. But so far the education of physics in Malaysia was not good enough with compare with other country. I had graduated and wish to continue in future study. I know is a better choice is going other...

I had meet a problem when I study the concept of the hot air balloon. The equation was giving Load = P*V*(1/TempAir - 1/TempBalloon)/R Then I reverse to TempBalloon = 1/[1/TempAir -Load*R/(P*V)] When the volume is less then 1m^3, the temperature calculated giving negative temperature...

I had read an article about a hot air balloon, when coming into balloon shape design, I had question on it. For best shape of the air balloon was the tear drop shape, but I do not know what is the physics behind it. From the article I read is about the pressure vector, and he is using an...

thanks alot:!)

I found a lot the the surface plasmon on prism geometry are using gold for metal film, and part of it are using silver. Why we need use gold or sivler as a metal film, is it about the condutivity?