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Energy-efficient insulated house, illustration

Cavity wall insulation, illustration

Cavity wall insulation, illustration

Cavity wall insulation, illustration

Double glazing, illustration

Double glazing, illustration

Double glazing, illustration

Incandescent light bulb efficiency, Sankey diagram

Conduction and insulation, illustration

Light bulb efficiencies, Sankey diagrams

Fluorescent light bulb efficiency, Sankey diagram

Fluorescent light bulb efficiency, Sankey diagram

Thermal conduction in water, illustration

Vacuum flask, illustration

Greenhouse effect, illustration

Microwave oven, illustration

Immersion heater, illustration

Building Energy Rating, illustration

Energy Efficiency Rating, illustration

Environmental Impact Rating, illustration

Fluorescent and incandescent light bulbs, illustration

Incandescent light bulb efficiency, Sankey diagram

Energy transfer, illustration

Non-renewable energy, illustration

Skin and ultraviolet light, illustration

Conduction and insulation, illustration

Seismic S-wave propagation, illustration

Convection currents in a saucepan, illustration

Smoke alarm, illustration

Electric switch and circuit symbol, illustration

Electric bar heater, illustration

Heat transfer in a pan on a stove, illustration

Potential and kinetic energy, illustration

Boyle's law apparatus, illustration

Charles's law apparatus, illustration

Pressure-temperature gas law, illustration

Charles's law apparatus, illustration

Gay Lussac's pressure-temperature gas law, illustration

Photovoltaic effect in a solar panel, illustration

Seven forms of energy, illustration

Colour temperature spectrum, illustration

Seismic P-wave propagation, illustration

Faraday-Tyndall effect, illustration

Molar volume, illustration

Mole formula, illustration

Mole formula, illustration

Mole formula, illustration

Elastic potential energy, illustration

Elastic potential energy in a spring, illustration

Hooke's law, illustration

One kilogram mass on a newton meter, illustration

Weighing an apple on a newton meter, illustration

Car crash, illustration

Centripetal force, illustration

Centripetal force, illustration

Convection current in heated water, illustration

Seismic S-wave propagation, illustration

Lightning conductor, diagram

Electrostatic precipitator, illustration

Electrostatic spray painting, illustration

Rotary potentiometer, illustration

Ripple tank with plane waves, illustration

Ripple tank, illustration

Ripple tank with plane and circular waves, illustration

Wavelength and amplitude, illustration

Wavelength and amplitude, illustration

Wavelength and frequency, illustration

Convex and concave lenses, diagram

Static electricity on rubbing rod with cloth, illustration

Thermal conduction in a metal, illustration

Moving coil loudspeaker, diagram

Moving-coil microphone, diagram

Digital camera with inverted image, illustration

Eye anatomy, illustration

Efficiency spectrum, illustration

Renewable energy, illustration

Prism refracting light into a spectrum, illustration

Prism refracting light into a spectrum, illustration

Prism refracting light into a spectrum, illustration

Prism refracting light into a spectrum, illustration

Prism refracting light into a spectrum, illustration

Wavelengths of coloured light, illustration

Red and green filters, illustration

Leaf reflecting green light, illustration

Storage heater, cutaway illustration

Water heating system, illustration

Lighting circuit with two-way switches, illustration

Three-pin plug, illustration

Circuit breaker, diagram

Residual current circuit breaker, diagram

Circuit breaker, diagram

Central heating circuit, illustration

Heat loss from a house, illustration

Solar thermal collector panel, illustration

States of matter, illustration

Energy efficiency, Sankey diagram

Ammonia molecule, illustration

Bromine molecule, illustration

Chlorine molecule, illustration

Nitrogen molecule, illustration

Nitrogen dioxide molecule, illustration

Nitrous oxide molecule, illustration

Sodium chloride molecule, illustration

Centrifugal and centripetal forces, illustration

Centrifugal force, illustration

Measuring the volume of an irregular object, illustration

Measuring the volume of an irregular object, illustration

Tides, illustration

Spark counter, illustration

Geiger-Muller tube, illustration

Geiger-Muller tube with alpha radiation, illustration

Paper thickness control, illustration

Seismic P-wave propagation, illustration

Gold leaf electroscope, illustration

Gold leaf electroscope, illustration

Van de Graaff generator, illustration

Van de Graaff generator, illustration

Longitudinal waves in a slinky spring, illustration

Alpha, beta and gamma radiation, illustration

Conduction, convection, radiation, illustration

Conduction, convection, radiation, illustration

Solar radiation and global warming, illustration

Solar radiation, reflection and absorption, illustration

Structure of Earth's atmosphere, illustration

Thermal conduction in water, illustration

Vacuum flask, illustration

Vacuum flask, illustration

Pressure unit conversion table, illustration

States of matter, illustration

Structure of mitochondria, illustration

Radiation treatment, illustration

Corrected long-sightedness, illustration

Short-sightedness, illustration

Corrected short-sightedness, illustration

Electromagnetic spectrum, illustration

Properties of a wave, illustration

Fructose sugar molecule, illustration

Galactose sugar molecule, illustration

Glucose sugar molecule, illustration

Pyruvate oxidation, illustration

Archer with a longbow, illustration

Temperature scale, illustration

Convection current, illustration

Colour temperature spectrum, illustration

Electrolysis, illustration

Electroplating with copper, illustration

Electrolysis, illustration

Electromagnet, illustration

Electric bell mechanism, diagram

Electromagnetic relay, diagram

Motor effect, illustration

Bicycle dynamo, illustration

Simple alternating current generator, illustration

AC dynamo and oscilloscope, illustration

Transformer, illustration

Transformer, illustration

Hard disk drive, illustration

Cathode ray tube, illustration

Cathode ray tube, illustration

Electromagnetic relay, diagram

Moving coil ammeter, illustration

Wavelength and frequency, illustration

Diffraction of long and short waves, illustration

Diffraction of microwaves and radio waves, illustration

Raybox, illustration

Shadow cast by a small light source, illustration

Pinhole camera, illustration

Reflection in a plane mirror, illustration

Image position in a plane mirror, illustration

Reflection in a plane mirror, illustration

Refraction in glass, illustration

Total internal reflection in an optical fibre, illustration

Camera with inverted image, illustration

Wavelengths of violet and red light, illustration

Colour dispersion in a prism, illustration

Red and blue filters, illustration

Shadow cast by a small light source, illustration

Shadow cast by a large light source, illustration

Periscope, illustration

Refraction in a fish tank, illustration

Refraction, real depth and apparent depth, illustration

Refraction in a fish pond, illustration

Fleming's left-hand rule for motors, illustration

Fleming's right-hand rule for generators, illustration

X-ray machine, diagram

Vibrations of a ruler, illustration

Motor effect, illustration

Shadow cast by a large light source, illustration

Greenhouse effect, illustration

Path of Halley's Comet, illustration

Lamp, illustration

Food mixer, illustration

Immersion heater, illustration

Water heating system, illustration

Immersion heater, illustration

Solar water heating system, illustration

Solar cell house, illustration

Solar cell house, illustration

Pressure exerted by stiletto heel and elephant's foot, illus

Earth's axial tilt, illustration