When water flows from a faucet, the water molecules tend to join together and form a stream. which of the four fundamental forces most likely accounts for this, and why?

Electromagnetic force is responsible for the inter-molecular interaction.  The fundamental force that join water molecules together when water flows from faucet is Electromagnetic force.

Fundamental Forces:

These are the parent force of any interaction in universe. There are four type of fundamental forces.

Electromagnetic Force:

This force work on charged molecules. In water molecule, difference between the electronegativity of Hydrogen and Oxygen is very high , which makes water molecule polar. These polar water molecules interact with each other by forming H- bond. This interaction between water molecules known as Cohesion.

Hence, the fundamental force that join water molecules together when water flows from faucet is Electromagnetic force.

To know more about fundamental forces, refer to the link:

link

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