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gcse unit 1 AQA

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