When a tap is open so that water comes out in a stream, one would observe the cross-section of water decreases as water descends? Why?

When a tap is open so that water comes out in a stream, one would obse

1.	When a tap is open so that water comes out in a stream, one would observe the cross-section of water decreases as water descends? Why?
Answer» SOLUTION :There will be loss in gravitational POTENTIAL energy and so KINETIC energy or fluid VELOCITY INCREASES from equation of continuity cross section must decrease.