Surface tension & capillary action

Surface tension & capillary action.
For more related figures, please have a look at the Fluid Dynamics category.

Edit and compile if you like:

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% Author: Izaak Neutelings (November 2020)
\documentclass[border=3pt,tikz]{standalone}
\usepackage{physics}
\usepackage{tikz}
\usepackage[outline]{contour} % glow around text
\usetikzlibrary{patterns,decorations.pathmorphing}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{angles,quotes} % for pic (angle labels)
\usetikzlibrary{arrows.meta}
\usetikzlibrary{bending} % for arrow head angle
\usetikzlibrary{calc}
\tikzset{>=latex}
\contourlength{1.1pt}
\colorlet{mydarkblue}{blue!40!black}
\colorlet{myblue}{blue!70!black}
\colorlet{myred}{red!65!black}
\colorlet{vcol}{green!45!black}
\colorlet{watercol}{blue!80!cyan!8!white}
\colorlet{darkwatercol}{blue!80!cyan!80!black!30!white}
\colorlet{metalcol}{blue!25!black!30!white}
\tikzstyle{piston}=[blue!50!black,top color=blue!30,bottom color=blue!50,middle color=blue!20,shading angle=0]
\tikzstyle{water}=[draw=mydarkblue,rounded corners=0.1,top color=watercol!80,bottom color=watercol!90!black,middle color=watercol!40,shading angle=20]
\tikzstyle{horizontal water}=[water,top color=watercol!90!black!90,bottom color=watercol!90!black!90,middle color=watercol!80,shading angle=0]
\tikzstyle{metal}=[draw=metalcol!10!black,rounded corners=0.1,top color=metalcol,bottom color=metalcol!80!black,shading angle=10]
\tikzstyle{vvec}=[->,very thick,vcol,line cap=round]
\tikzstyle{force}=[->,myred,very thick,line cap=round]
\tikzstyle{width}=[{Latex[length=4,width=3]}-{Latex[length=4,width=3]}]
\tikzstyle{mydashed}=[dash pattern=on 1.5pt off 1.5pt]
\begin{document}
% SURFACE TENSION in container
\begin{tikzpicture}
  \def\W{1.8}     % tank width
  \def\H{1.4}     % height tank
  \def\h{0.80*\H} % height water
  \def\F{0.2}     % vector magnitude
  \def\r{0.02}    % radius dot
  \def\x{0.15*\W} % x position surface dot
 
 
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