Q. Examples of bulk flow by a positive hydrostatic pressure gradient and a negative hydrostatic pressure gradient are
A) Suction through straw and swelling of wood, respectively
B) Imbibition and a garden hose
C) Garden hose and suction through a straw, respectively
D) Swelling of wood and imbibition, respectively
Explanation
A characteristic of mass flow is that the substances, whether in a solution or in a suspension, are swept along at the same pair, as in flowing river. Bulk flow can be achieved either through a positive hydrostative pressure gradient ($e.g.,$ a garden hose) or a negative hydrostatic pressure gradient $(e.g.,$ suction through a straw)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.