Final answer:
The question focuses on the #3 hydraulic system and its exclusive applications. Hydraulic systems are used in various contexts, including heavy machinery like bulldozers and power brakes in vehicles, as well as in natural examples like the jumping movements of spiders.
Step-by-step explanation:
The subject of the student's question pertains to hydraulic systems, specifically inquiring about items that are powered exclusively by the #3 hydraulic system. In various mechanical and engineering contexts, hydraulic systems provide the necessary power to operate different types of machinery. Applications of hydraulic systems range from automotive brakes to construction equipment. For instance, hydraulic systems in vehicles are crucial for enabling power brakes, where a motorized pump does most of the work to ensure vehicle control and safety. Likewise, heavy machinery such as bulldozers and backhoes often rely on hydraulic and mechanical lever systems to facilitate their operation. An interesting biological example of hydraulics in action is the jumping spider, which uses hydraulic pressure to jump many times its own body length. The principles governing these systems, like Pascal's principle, emphasize that although a hydraulic system can increase force, the total work done (product of force and distance) remains conserved.