A nozzle is a device used to direct and control the flow of fluids, such as liquids or gases. It typically consists of an opening through which fluid flows and a narrowing section that reduces the cross-sectional area of the flow passage. The shape of the nozzle can be conical, cylindrical, or any other form depending on its intended use. Nozzles are commonly used in various applications such as plumbing fixtures, spray bottles, fire hoses, and rocket engines to name a few. In essence, a nozzle is an essential component that helps regulate the flow of fluids by converting potential energy into kinetic energy, thus increasing the velocity of fluid particles as they exit the nozzle.