actual velocity of jet at vena contracta to the theoretical velocity

area of jet at vena contracta to the area of orifice

loss of head in the orifice to the head of water available at the exit of the orifice

actual discharge through an orifice to the dieoretical discharge

horizontal line

inclined line with flow upwards

inclined line with flow downwards

any direction and in any location

higher

lower

equal

none of these

1/R_N

4/R_N

16/R_N

64/R_N

Under ground flow

Flow past tiny bodies

Flow of oil in measuring instruments

all of these