Science

Today doing science we learn to go pneumatic systems and hydraulic systems. Hydraulic systems are systems that use the liquid under pressure to transmit a force and to do work. For example: rescue workers used hydraulic systems to free people trapped in vehicles And Apneumatic system to system that uses a gas, usually air, under pressure to transmit a force. In order for a gas to be put to work in a fluid system, it must first be compressed. For example: the dentist office uses pneumatic system.