Science Chapter 9

Hydraulic rams

Can lift heavy loads

Animals can use this power too

archer fish use hydraulic power
to shoot water

work by forcing fluid into either side of a piston
allowing powerful movement

Some systems use a combination of both systems

Pneumatic power

Can be used to lift heavy loads

allow kneeling buses to let passengers enter and
exit quicker.

Compression

Packed closley together

hydraulic

Water compression

less compressible than air

Pneumatic

Air compression

More compressible than water

Fluid systems

Uses

Blood pressure guage

Pneumatic hammar

Hydraulic cutters

components

Pump

Cunductor

Valve

Pressure Monitor

Pascal's law

forces applied to fluids distribute equally

measured in pascals (p)

formula: F/A

uses

Hydraulic breaks

Open and close doors

Hydraulic Marvel

buses

Pressure

The force per unit area

Fluids exert pressure

Atmospheric pressure

The force the atmosphere exerts

decreases the higher you ascend

Deep sea divers withstand high pressure with
suits

Valves

the heart has four valves to help force
blood in one direction

keep blood flowng

car engines use valves to allow fuel to enter
and exhaust to exit

Car engines are also known as
international combustion engines

circulatory system is a closed
hydraulic system

Fluid filled and closed

Veins have valves

like one way gates that stop blood from
pooling and backing up

some people have valves that don't close, causing the
area to backup and swell

Dangers of compression

More compression means more pressure

The particles start to move aster, hitting the can
which can cause it to explode.

compressability

Gasses compress more than liquids

Any increase in particle collision can make the
pressure rise