Pressure 5.0 / 5 based on 1 rating ? PhysicsEnergyIGCSEEdexcel Created by: GraceCreated on: 22-04-13 20:55 Density = Density = mass/volume 1 of 16 Pressure is measured in ? Pascals - Pa 2 of 16 In gases and liquids at rest, what is the pressure ? The pressure at any point acts equally in all directions 3 of 16 In gases and liquids the presure increases or decreases with depth ? Increases 4 of 16 The pressure is higher or lower at the bottom of the sea ? Higher 5 of 16 What is pressure difference ? Pressure difference is the difference in pressure between two points in a liquid or gas 6 of 16 Pressure difference = pressure difference = height x density x gravity 7 of 16 What is the coldest anything can ever get ? -273 degrees C 8 of 16 A temperature change of 1 degrees C is also a change of how many kelvins? 1 9 of 16 In a gas how are the particles arranged ? They randomly bang into each other. They are very light but they aren't massless 10 of 16 When gas particles collide with something what do they exert? A force on it and their momentum and direction change 11 of 16 In a sealed container gas particles smash against the containers walls creating ? An outward pressure 12 of 16 The pressure depends on ...... How fast the particles are going and how often they hit the walls 13 of 16 More heat = More collisions so therefore more pressure 14 of 16 Same amount of gas in a bigger container pressure decreases 15 of 16 When volume is reduced ..... More collisions so therefore pressure increases 16 of 16
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