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CHAPTER 6: AIR PRESURE Slide 2 Slide 3 Air pressure : the sum of the forces of all the particles striking the wall, divided by the area of the wall. force Air pressure = ------- area Slide 4 Slide 5 Slide 6 Air pressure is measured with Barometer. Pressure gauge Bourdon gauge Slide 7 Less pressure Sea level = 1 atmosphere If more air, so its denser. (air pressure is greater) Air particles and density are less. Example: Peak of the mountain Soalan exam trial Kelantan 2011 Slide 8 Factors affecting air pressure. Gas particles Air pressure collisions Force exerted Onto the wall Slide 9 Slide 10 The effect of volume on air pressure. Slide 11 Factors affecting air pressure Slide 12 Air pressure Collision Force exerted onto the wall. Number of Air particles Temperature on air pressure Volume on air pressure Slide 13 Slide 14 Air pressure All directionInfluenced by volume Pressure increase When compressed temperature Pressure increase When temperature increase Applied in Syringe Siphon Spray Drinking straw Storage of gases High pressure liquid Acts in whereby Carry out in Changes gas into Closely related to Slide 15 Slide 16 Slide 17 Slide 18 Check ? Slide 19 AIR PRESSURE CAUSED BY COLLISIONS AND BOUNCING OFF OF AIR PARTICLES FROM THE WALLS OF A CONTAINER IS AFFECTED BY: 1. VOLUME 2. TEMPERATURE IS USED IN APPLIANCES TO SOLVE PROBLEM SUCH AS BLOCKAGES IN SINKS AND POURING CONDENSED MILK EASILY FROM A CAN. GASES UNDER HIGH PRESSURE: 1.CHANGE INTO LIQUIDS 2. ARE STORED IN TANKS. 3. MUST BE USED WITH GREAT CARE. conclusion Slide 20 Siphon & syringe PMR 2011 Slide 21 Insecticide spray & Drinking straw Slide 22 Filter pump & Sucker hook Slide 23 SUCTION PUMP Slide 24 Slide 25 PMR 2010 Slide 26 Slide 27 Slide 28 Slide 29 Slide 30 Slide 31 PMR 2012 Slide 32 Slide 33 Slide 34 Penutup 2. Tasbih Kifarah. 1. Baca Surah Al-`Ashr