Recent content by zoteman94

Woah, thanks for all the answers! I just found an old adjustable voltage power supply that works with low currents. I will take into account your suggestions when I do higher current electrodepositions.

Thanks for the idea, but I think that wouldn't work because I need a somewhat high current (an amp or two) and the resistor would limit it.

Oh, I didn't consider that. I will try. Thanks!

Hi. I have made a 12Vdc 3A unregulated power supply for my projects. I want to do some electrodeposition, and the 12V are a bit too high (It starts to electrolyze water and the deposited copper breaks very easily). I'm looking for a way to step-down the voltage without using too much money...

Well, I just want to know the maximum Carnot efficiency an hypothetical engine running on convective movement, so ideal conditions can be assumed.

Thanks for the answers. I would still like to know which equations predict these results though.

Ok, so the system of anti parallel photons does have mass, most now makes sense to me (I hope I'm right). By the way, which equations establish this geometry?

Hi, I'm not sure if this is the correct section to post this. As far as I know, it is widely accepted that antimatter has "normal" gravity, and that for creating a matter-antimatter pair, you need to input the rest mass of the particle in energy (Einstein's equation). But as potential...

Ok ok people, yes, it's a hollow torus. I didn't specify thickness or fluid inside because I was looking for a general answer, however if you have any data for specific cases (e.g. water fluid, air, anything or specific thickness or material of the torus (maybe an ideal heat insulator)) I would...

Calculating convection movement. Is there a simple way of calculating the mass flow inside a torus as a result of a difference in temperature. Asuming the torus is placed vertically and the heat source and sink placed in this way. Thank you very much. Cold side ( o ) Hot Side