OCR Physics 9-1 P1 Matter 0.0 / 5 ? PhysicsMatterGCSEOCR Created by: JoshOoohCreated on: 18-12-17 21:22 Density = Mass/Volume 1 of 31 The Law of Conservatio of Mass Particles do not appear or disappear. (1g of ice melts = 1g of water) 2 of 31 0 °C = ?K 273 3 of 31 The average kinetic energy of particles is the temperature 4 of 31 Specific heat capacity is the energy needed to raise the temp of 1kg of a material by 1K 5 of 31 Heating increases the internal energy of the material 6 of 31 The amount of energy needed to raise the temp of an object depends on (3 things) the type of material, the mass, the temperature rise 7 of 31 Change in thermal energy = mass x shc x change in temp 8 of 31 symbol for specific heat capacity (e.g. mass(kg)) J/kg°C 9 of 31 The specific latent heat of fusion (or melting) is the energy transferred when 1kg of a substance chances from a solid to a liquid (or reverse) 10 of 31 The specific latent heat of vaporisation is the energy transferred when 1kg of a substance changes from liquid to gas 11 of 31 Latent heat is about changes in ... whereas heat capacity is about changes in ... state temperature 12 of 31 If the temperature of a gas increases then the particles have a higher average speed 13 of 31 Higher temperature in gas causes a higher pressure 14 of 31 The pressure of a gas is measured in pascals(Pa) 15 of 31 1 Pa = 1N/m^2 16 of 31 Pressure = force per unit area 17 of 31 P(s) = F/A 18 of 31 Liquid pressure = Density * Grav field strength * height 19 of 31 P(l) = ρgh 20 of 31 Pressure is the same if the density and height is the same 21 of 31 Boyle's Law P1V1 = P2V2 22 of 31 Pressure and volume are inversely proportional 23 of 31 Gas exerts pressure through collisions with objects of surfaces 24 of 31 Three ways to increase pressure Increasing energy (heating gas), increasing collisions (num of particles), decreasing volume of container 25 of 31 Pressure and temperature are proportional 26 of 31 Gases in the atmosphere exert atmospheric pressure 27 of 31 When you pump out air of an object atmospheric pressure causes the object to collapses (squashing a coke can) 28 of 31 Diameter of an atom 10^-10 29 of 31 Atmospheric pressure = 100kPa 30 of 31 Pressure is bigger near the surface of the Earth due to the weight of air above 31 of 31
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