CHAPTER 6: AIR PRESURE

Air pressure : the sum of the forces of all the particles striking the wall, divided by the area of the wall.

forceAir pressure = ------- area

Air pressure is measured with Barometer.

Pressure gauge

Bourdon gauge

Less pressure

Sea level = 1 atmosphere

If more air, so its denser. (air pressure is greater)

Air particles and densityare less.

Example: Peak of the mountain

Soalan exam trial Kelantan 2011

Factors affecting air pressure.

Gas particles Air pressure collisions

Force exertedOnto the wall

The effect of volume on air pressure.

Factors affecting air pressure

Factors affecting air pressure Air pressure Collision

Force exerted onto the wall.

Number of Air particles

Number of Air particles

Temperature on air pressure

Temperature on air pressure

Volume on air pressure

Volume on air pressure

Acts in

whereby whereby

Carry out in

Changes gas into

Closely related to

Check ?

AIR PRESSURE

CAUSED BY COLLISIONS ANDBOUNCING OFF

OF AIR PARTICLESFROM THE WALLSOF A CONTAINER

IS AFFECTED BY:1. VOLUME

2. TEMPERATURE

IS USED IN APPLIANCES

TO SOLVE PROBLEMSUCH AS BLOCKAGES

IN SINKS AND POURINGCONDENSED MILK

EASILY FROM A CAN.

GASES

UNDER HIGHPRESSURE:

1.CHANGE INTOLIQUIDS

2. ARE STOREDIN TANKS.

3. MUST BE USEDWITH GREAT

CARE.

conclusion

Siphon & syringe

PMR 2011

Insecticide spray  & Drinking straw

Filter pump & Sucker hook

SUCTION PUMP

PMR 2010

PMR 2012

PMR 2012

PMR 2012

PMR 2012

Penutup

2. Tasbih Kifarah.

1. Baca Surah Al-`Ashr