1) The net downward meniscus force on the tube will be balanced by an
adjustment in whatever force is supporting the weight of the tube (buoyancy
if it is floating; normal forces of rigidity if it rests on a floor).
2) The "toroidal shearing moment" will be resisted by stresses in the tube
wall material.
Bob
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
www.velocity.net/~trebor