Recent content by Kramjit

Hi to all! In the simple electrolysis of water, may you point me in the right direction with regards to: 1) Rate of evolution 2) Bubble size control As in what parameters will affect the above (eg voltage? diameter of exposed wire? length of exposed wire? salt content?) Better...

Perhaps we could use a material with low coefficient of friction as a material for the ramp, as described by Mr./Mdm mgb_phys. Eliminate also, altogether, the use of grease. Fundamentally, I just would like to know if existing methods scratch the paintwork. Thanks

So you are saying that there is not a slightest damage to the coating in all cases? Thanks

Hi! I saw from youtube clips that dry dock ship launching use these wooden(?) contraptions. Do they cause damage to the paint coat of the ships? Thanks

Suppose I connect 2 9v batteries (for example) in series with a fish tank (30mm x 30mm x 20mm) containing water and an ammeter, is the current registered the same as the current in the water? I should think so but I am not sure. The copper wires-cum-electrode being positioned at either ends...

Hi! I believe a shipyard working on new ships, with all its electrical arc welding and stuff, makes for a lot of "stray" currents in the sea. Do you guys have any plausible idea to re-create such scenario in the lab? A small-scale model perhaps? Thanks a lot.

Oh yes. I forgot to mention that the electrolyte will indeed be present (seawater). So are you saying that my set-up will be alright? Like I said, I worry that my experiment sounds too simple. Thanks

Oh yes. I forgot to mention that the electrolyte will indeed be present (seawater). So are you saying that my set-up will be alright? Like I said, I worry that my experiment sounds too simple. Thanks

Mini Cathodically-Protected steel plate... Hi guys/gals: I am doing a project on cathodic protection. If I have a steel and zinc plate, does bolting them together with nothing at the interface suffice as Cathodic Protection? It looks too simple to be true. So I need your help to validate the...

Thank you Thank you all that responded. I understand fully now.

Yes I do know how to find the second moment of area rectangles. But I am not sure of the parallel axis theorem.

Greetings all, Given an upright T-beam (really a T when you look at it) with all dimensions given, what is the procedure for finding the second moment of are about the z axis (I sub z)? Thank you so much.