A bottle is kept on the ground as shown in the figure. The bottle can be modeled as having two cylindrical zones. The lower zone of the bottle is filled with honey of density and has a cross sectional radius
The upper zone is filled with water of density
and has cross-sectional radius
. The height of the upper zone is
and that of the lower zone is
If now the honey and water are allowed to mix and from a homogeneous solution (assume that total volume doesn't change)
The pressure at the base of the bottle remains same.
The normal reaction on the bottle from the ground changes.
The pressure at the base of bottle increases by
The pressure at the base of bottle decreases by