Science Chapter 9

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2019 POI

Szerző: Jansen Jansen

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Floating topic

9.5

Any increase in particle collision can make the pressure rise

compressability

Gasses compress more than liquids

Dangers of compression

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

More compression means more pressure

9.7

circulatory system is a closed hydraulic system

Veins have valves

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

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

Fluid filled and closed

Valves

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

Car engines are also known as international combustion engines

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

keep blood flowng

9.4

Pressure

Fluids exert pressure

Atmospheric pressure

Deep sea divers withstand high pressure with suits

decreases the higher you ascend

The force the atmosphere exerts

The force per unit area

Pascal's law

uses

Hydraulic Marvel

buses

Hydraulic breaks

Open and close doors

forces applied to fluids distribute equally

formula: F/A

measured in pascals (p)

9.1

Compression

Fluid systems

components

Pump

Valve

Pressure Monitor

Cunductor

Uses

Blood pressure guage

Pneumatic hammar

Hydraulic cutters

Packed closley together

Pneumatic

More compressible than water

Air compression

hydraulic

less compressible than air

Water compression

9.8

Pneumatic power

Can be used to lift heavy loads

allow kneeling buses to let passengers enter and exit quicker.

Hydraulic rams

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

Some systems use a combination of both systems

Can lift heavy loads

Animals can use this power too

archer fish use hydraulic power to shoot water