Fluid systems refer to the study and application of fluids, which include liquids and gases, in various engineering and scientific contexts. These systems are essential in understanding how fluids behave under different conditions, such as pressure, temperature, and flow rate. Applications range from hydraulic systems in machinery to the design of pipelines and water supply networks. In fluid systems, key concepts include Bernoulli's principle, which explains the relationship between pressure and velocity in flowing fluids, and Pascal's law, which describes how pressure is transmitted in a confined fluid. Engineers and scientists use these principles to design efficient systems for transportation, energy generation, and environmental management.