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P1 GCSE
gcse unit 1 AQA
| Question | Answer |
|---|---|
| specific heat capacity formula | E= M x C x O |
| specific heat capacity formula: E | energy transfer (j) |
| specific heat capacity formula: C | specific heat capacity (J/Kg*C) |
| specific heat capacity formula: O | temperature change (*C) |
| specific heat capacity formula: M | Mass (kg) |
| Calculating speed of wave | Speed[m/s] = frequency[Hz] x wavelength[m] |
| Renewable energy resources | Wind. Wave. tides. HEP. Solar. Geothermal. Food. Biofuels |
| Non-renewable energy resources | Coal. Natural Gas. Oil. Nuclear fuels |
| Transverse wave eg. | Light. EM waves Ripples in the water |
| longitudinal wave eg. | Sound. Ultrasound. Shock waves |
| Calculating payback time | Payback time = Initial cost / annual saving |
| Factors affecting the rate of condesation | |
| U-values? | Measures how effective a material is as an insulator. higher the number-worse the insulator |
| convection? | occurs when the move energetic particles move from the hotter region to the cooler region-and take their heat energy with them. |
| conduction? | the process where vibrating particles pass on their extra kinetic energy to neighbouring particles |
| conduction is faster in.. | denser solids because particles are closer together and collide more often. |
| Evaporation? | Particles escape from a liquid's surface. can take place melting p-boiling p. higher KE = higher chance to escape,leaving low KE = cooling effect. |
| condensation? | Gas cools/slow down/ lose KE. the attractive fores between particles pull them closer together. |
| Energy forms | Light. heat. chemical. kinetic. electrical. elastic. gravitational potential. nuclear. sound. |
| calculating efficiency | efficency = useful energy out/ total energy in |
| dissipated | the energy is spread out and lost. |
| When heating a substance.. | you give the particles more kinetic energy. |
| Solid particle structure | Strong forces of attractions. close together in fixed,regular arrangement. Vibrate. low kinetic energy |
| liquid particle structure | weak forces of attraction. particles close together. form irregular arrangements. move at slow speeds. |
| Gas particle structure | most kinetic energy. move @ high speeds. almost no forces of attraction between particles. |
| useful energy | energy is only useful when it can be converted from one form to another. |
| Dark, Matt surfaces.. | good absorbers, good emitters of infrared radiation |
| Light, shiny surfaces.. | are poor absorbers and poor emitters of infrared radiation and good reflectors. |
| low amplitude = | Quieter sound |
| low number of waves = | lower frequency |
| higher amplitude = | louder sound |
| higher number of waves = | higher frequency |
| thermal radiation? | is energy transfer by electromagnetic waves |
| Mnemonics for Energy types | GEEKS LUNCH |
Created by:
CBA
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