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a) define hydraulics. some of the power of hydraulics are in the link []
 * Hydraulics** is a topic in applied science and engineering dealing with the mechanical properties of liquids

2 define pneumatic.Presureized gas to make motion. ex:steam train

3. name 4 hydrolic devices: exavator,bulldozer,backhoe and forkclift

4.name 4 pnuematic devices: train,aircompresser, jack hammer and paintball gun

5. hydrolics work by pushing fliuds through tubes to create presure to move things. ex exevator

6.pneumatics work from presureinzing gasses to create motion: ex train

7. Hydrolics uses liquid and pneumatics uses presureized gasses