Bulk flow can be achieved through a hydrostatic pressure gradient. Negative hydrostatic pressure gradient and positive hydrostatic pressure gradient are seen in

Options

A. Suction through a straw and a garden hose respectively
B. A garden hose and suction through a straw respectively
C. Cobalt chloride paper and polyethene respectively
D. Blotting paper and cobalt chloride paper respectively

Answer

A

Explanation

Bulk flow can be achieved through a hydrostatic pressure gradient. Negative hydrostatic pressure grtadient and positive hydrostatic pressure gradient is seen in suction through a straw and a graden hose respectively