inversely proportional to H^3/2

directly proportional to H^3/2

inversely proportional to H^5/2

directly proportional to H^5/2

0.855 a2gH

1.855 aH2g

1.585 a2gH

5.85 aH2g

velocity

(velocity)²

(velocity)³

(velocity)⁴

steady flow

uniform flow

free vortex

forced vortex

it is easier to see through the glass tube

glass tube is cheaper than a metallic tube

it is not possible to conduct this experiment with any other tube

all of the above