Fire hoses and the nozzles (often referred to as "guns") attached to them are used to deliver water or other fire retardants to extinguish fires, allowing firefighters to control the flow and direction of the water stream.

Here's a more detailed explanation:

Fire Hose:

A fire hose is a flexible, reinforced tube designed to transport water or other fire suppression agents (like foam) from a water source (like a fire hydrant or a fire engine) to the fire.

Fire Hose Nozzle (or "Gun"):

A nozzle is attached to the end of the fire hose and allows firefighters to control the flow and pressure of the water, enabling them to aim the water accurately at the base of the fire to extinguish it effectively.

Types of Nozzles:

There are different types of nozzles, each designed for specific applications, such as straight stream nozzles for reaching distant fires, or fog nozzles for cooling and suppressing fires.

How it Works:

The nozzle creates a restriction at the end of the waterway, which changes water pressure to velocity, allowing the water to reach the fire.

Other Uses:

Fire hoses and nozzles can also be used for crowd control, or for other purposes where a strong stream of water is needed.

Importance:

Fire hoses and nozzles are essential firefighting tools, enabling firefighters to effectively suppress fires and protect lives and property.