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Description
Flashcards by Maxime PANS, updated more than 1 year ago
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Created by Maxime PANS
over 6 years ago
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| Question | Answer |
| What is density | Density is how many particles are in a certain volume the denser the object the heavier it is. |
| Density Equation | Density = Mass / Volume special p = m / V p = kg/ m^3 m = kg V = m^3 |
| How to measure the density of irregular shapes. | Archimedes Principle: 1.Start with an Archimedes Cup and fill it until it reaches the bottom of the spout 2.Then you weigh the object with a weighing scale and then convert it into Kg and record it. 3.You then place a measuring cylinder below the end of the spout and then gently place the object into the Archimedes Cup and wait until all water has been displaced into the measuring cylinder. 4. Then you read and record the volume displaced in the measuring cylinder. 5.Then you divide the mass by the volume to find out the density of your object. |
| Pressure Equation | Pressure = Force / area Pressure: Pa Force: N Area: m^2 |
| Pressure in Liquids | Pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all areas of the space. This is the basic principle for any hydraulic system |
| Height and Pressure | The pressure increases as the depth increases, this is because the force acted upon at the bottom of the spouting can is greater than above as their is more water weighing on it. |
| Height and Pressure Equation | Pressure = Density x Gravitational Field Strength x height Pressure: Pa Density: Special P GFS:N Height: m |
| State Changes | |
| Describe a Solid | Tightly Compacted In uniform order Vibrating slightly Strong Bonds |
| Describe a Liquid | Less Tightly Compacted Not as uniform as a solid Weak bonds Vibrating more |
| Describe a Gas | No bonds A lot of energy Moving very fast Far from each other. |
| Ethanol Demo | Ethanol has a low Boiling Point meaning when you blow on it you are giving energy to it causing it to evaporate. When it evaporates it takes all the heat with it leaving just a cold temperature on your hand. It is taking energy from your hand. |
| Temperature Time Graphs | Temperature time graphs shows at what time a specific compound melts, boils and evaporates. Flat areas of the line indicate that the energy is breaking the bonds thus changing state. |
| Specific Heat Capacity Equation | Change in thermal energy = mass x specific heat capacity x change in temperature Delta Q ( J ) m ( KG) Specific Heat Capacity or c (J/KG) Delta T ( °C or K ) |
| What is Specific Heat Capacity | Specific Heat Capacity is how much energy it takes to heat up a substance of 1KG by 1°C |
| Investigating Specific Heat Capacity | Power = Energy Transferred / time taken P = E /t E = Pt E = m x c x delta T Pt = m x c x delta T c= Pt/m x delta T |
| What is Kelvin | A temperature scale which has an absolute zero, temperature below this cannot exist |
| What is Absolute Zero | The lowest temperature that is theoretically possible ( at this temperature particles would stop vibrating and have zero pressure) |
| The Pressure Temperature Law | The temperature increases, this causes the speed of the air molecules to increase. This increases the rate of collision with the wall which increases the force. This then makes the pressure increase as pressure = force / area, increasing the force would increase the pressure. |
| How much is Atmospheric Pressure | 101,500 pa |
| The pressure temperature law states that | If you divide one pressure by the temperature you recorded it in it should get the same result if you divide another pressure by the temperature it was recorded in. P1/ T1 = P2/T2 |
| Boyles Law | The pressure of a gas is inversely proportional to its volume at a constant temperature. P1 = (P2 x V2) / V1 P2 = (P1 x V1) / V2 V1 = (P2 x V2) / P1 V2 = (P1 x V1) / P2 |
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