explain with diagram that liquid exert produce on the walls
Answers
It doesn't, liquid by itself is inert and will actually do the opposite. Liquid, by itself, will ball up in a spherical shape exerting no external pressure at all. Internally there's a degree of pressure but given its central 'apple core' nature it's only in one direction and exclusively internal.
Add gravity and it becomes a different story. The liquid will be pulled in one direction, flowing through and around anything in its path towards the pull of gravity.
Which brings us to your question.
Add a container (a cube in this instance) to hold the liquid, and the mechanics in question can be analyzed. Once again, though, we find the liquid doesn't exert pressure in all directions it only exerts force on 5 sides of the cube. The top experiences no exerted force due to the effect of gravity pulling the liquid down.
Now if we pressurized the liquid, then yes, it exerts force in all directions until it's compression is nullified.
If we use centrifugal force the liquid will only exert pressure perpendicular to the spin. (without gravity) With gravity the liquid will exert downward pressure once again, but only until the centrifugal forces effect on the liquid is greater than the effect of gravity.
With these examples I'd conclude that you can't prove liquid exerts pressure in all directions, because it doesn't. The only thing I'm thinking of that comes close is compression, but everything when compressed by external force will push back until the internal and external forces cancel each other out. It's the physical nature of things.