EmMc+BeWi

1)Define hydraulic- the study of pressure and liquid.

2)Define pneumatic- the study of pressure in gases.

3)What are 4 hydraulic devices- bus doors,automatic doors, ignishon in cars, fridges.

4)What are 4 pneumatic devices- drills,switchs,airguns,launchers.

5)How to hydraulic systems work-two pistons and an oil fild pipe connecting them.

6)How do pneumatic work- a device that uses air pressure.

7)What are the major differences between hydralic and penaumatic systems- one uses pressuer and liquid and one uses presser -ans gas.

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