Recent content by sina_mech

Any suggestion? :)

@jtbell Thank you for your reply. Actually those small bubbles matter. I'd like to know if there is a way to have the field without having the bubbles (which are the result of electrolysis).

Hi! Can we create electric field in water, using electrodes (say 10-15V of voltage difference), without having electrolysis or arc in water? (the water can be salty). I just read that insulated electrodes can be used. but I'm not sure. PS: Sorry if the question sounds silly. My field of study...

the material is stainless steel. the hollow cylinder (tube) already exist and we would like to impose electric field inside it.

Hi! I would like to create an electric field inside a cylinder. Is there any EXPERIMENTAL way to impose 120V DC (or any higher or lower) voltage on the surface of a cylinder and generate electric field inside it? I'm specifically looking for "experimental" approaches. Thank you very much :)

Hi, Imagine we have few particles with different diameters in fluid flow. so, can we neglect brownian forces at certain particle diameters? Actually I'm looking for a criteria in which we can neglect the effect of brownian forces in fluid flow. Thanks :-)

Thanks Samon4. This is the problem ( V is velocity, "a" is acceleration)

Could you briefly give me some hints (and also names) of those equations? I think I need to solve some ODEs, I'm familiar with kinematic part (yes! mechanical engineer!) but honestly, I have no clue about the electrical part. :) Thanks

Thanks for your answer. Actually I'm not really familiar with these concept. So sorry if my questions look really basic. So, like you said, we don't have any field. now, imagine a positively charged particle passes through two positively charged plates. How can I write the energy balance for...

Hi I'm looking for a equation (or equations) needed to calculate the electric field between to plates with the same charge. For example, two plates with positive charge. Any help is appreciated.

No help ??

hi friends , please help me to solve this problem , THANKS : A ball with radius r and mass m with angel 30 with horizon and with velocity V, according to figure, enters to a semispherical shell with radius R and the coefficient of friction between semispherical shell and ball is µ . This...