Recent content by Kamira

Thank you JD! I have tried to solve it with a more precise way (integrals) but with no success. Calculating that volume in function of angle teta. (

jdbriggs?

Thanks Rc and Jbriggs for explaining. Trying to do calculation (and using cylinders and real case)... I think (hope) that's correct.

In your explanation has committed an inaccuracy. No need to compute to demostrate that, pure physics. There is no approach that can allow an half sphere like that to receive an upwards force of buoyancy. I am sorry. Maybe you noted too that mistake and so the "there are many approaches.." The...

In every point of the sphere there is a pressure ρ*g*h with ρ water and h the high of water in the point. To obtain a righ computation , it's necessary consider those pressure and the surface on which are applicated (integrating in the case of sphere). No buyancy force anyway that push...

I am sure of that without computation. No buoyancy for a semisphere posed on the bottom of a tank of water. Only the weight of the water on it.

We can call the approch as we want, but an half sphere in the bottom of a tank doesn't experiment any buoyancy, no force thant pull upwards. The only force due the water is pushing the ball down.

Thanks Jb for your answer and time! You are very clear. I will analyze it very carefully. Right now just a question. You write: "If it makes it half-way in then it contributes pi/12 to the buoyancy for a total of 11pi/12 (about 2.9)" But an half introduced sphere in the bottom doesn't...

Interesting jbriggs444 ! In case of sphere or cylinders so...which do you think will be the balanced situation? Thanks you! It was a very good explanation!

Yes in the first image is unstable, i ask for the stable situation in the second image. The buoyancy force of the cubes pulls up, but the pressure at the bottom will resist for the bottom cube. The resultant of these forces will permit the cube to penetrate a little? If yes...how much? I...

The video: https://www.youtube.com/watch?v=JrhurV3pp1I

Is the image give problems...

Hi guys, i will propose you the problem in another way, More clear, and images. I have a tank with water (10 m hight) , with an ideal seal at the bottom (water can't fall down, but can enter bodies). I have a system of 6 cubes ( of plystynere) with dimension 1x1x1 m. These cubes are...

with a wire (volume negligible)

Hi Russ! Thanks for the welcome. I am not at all a believer of perpetual motion (as you can see and read in my first post!) (my objective is to prove it doesn't and never works, without using Termodinamic principles) only with basic Phisic, so as a Galilean i want to prove with formulas and...