Question

When a smooth flowing stream of water comes out of a faucet it narrows as it falls. Explain why this happens.

Answer 1

Step-by-step explanation:

The answer is simple: Gravity. Like all objects, a stream of water also accelerates as it falls. Since the density of water is a constant, and water tends to hold together (cohesion), the only thing that can happen is the narrowing of the stream -- which is exactly what happens.