AQA Physics 1

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AQA Physics 1 by Mind Map: AQA Physics 1

1. Waves, communication and the Universe

1.1. Wavelength, frequency, amplitude

1.1.1. Wave equation

1.2. Longitudinal waves

1.2.1. Sound Frequency and pitch Amplitude and loudness Echoes

1.2.2. Compression and rarefaction

1.3. Transverse waves

1.3.1. Electromagnetic spectrum Speed in a vacuum Communication Radiowaves Microwaves Infra-red Visible light

1.4. Reflection

1.4.1. Normal Angle of incidence = angle of reflection Constructing ray diagrams

1.5. Refraction

1.6. Diffraction

1.7. Origins of the Universe

1.7.1. Doppler effect Wavelength increasing Red-shift

1.8. CMBR

1.8.1. Cosmic microwave background radiation Evidence for Big Bang Theory

2. Electrical appliances

2.1. Energy transfer E = P x t

2.2. Mains electricity

2.2.1. Cost Kilowatt hours

2.3. Generating electricity

2.3.1. Advantages and disadvantages of different methods Wind Solar Geothermal Wave Hydroelectric

2.3.2. Heating water to produce steam Turbines Generators Fossils fuels Uranium / plutonium Biofuels

2.3.3. Supply and demand

2.3.4. National grid Overhead and underground cables - advantages and disadvantages Step-up / step-down transformers

3. Energy efficiency

3.1. Energy transfer

3.1.1. Conservation of energy Wasted energy - e.g. heat

3.2. Calculating energy efficiency

4. Energy transfer by heating

4.1. Kinetic energy

4.1.1. States of matter Solid Liquid Gas Evaporation Condensation

4.2. Heat transfer

4.2.1. Conduction

4.2.2. Convection

4.2.3. Radiation Surface Dark, matt Light, shiny Infra-red

4.2.4. Rate of heat transfer Material Surface area Difference in temperature

4.3. Heating and insulating buildings

4.3.1. U-values Low U-value Good insulator

4.3.2. Solar panels

4.3.3. Specific heat capacity