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Loudspeaker soundwave, illustration

Aircraft flight recorder, illustration

Electric toothbrush, illustration

Mapping the ocean floor, illustration

Early electric telegraph machine, 19th Century illustration

Early electric telegraph receiver, 19th Century illustration

Laser, illustration

Electric buzzer and circuit symbol, illustration

Electric lamp and circuit symbol, illustration

Variable resistor and circuit symbol, illustration

Circuit board, illustration

Simple lighting circuit, illustration

Rheostat resistor, illustration

Rotary potentiometer, illustration

Early electric engine, 19th Century illustration

Free-space optical transceiver, illustration

Free-space optical transceiver, illustration

Marcel Deprez, French electrical engineer

Catadioptric telescope, illustration

Catadioptric telescope, illustration

Stellarator nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Tokamak nuclear fusion reactor, illustration

Early telegraph printing receiver, 19th C illustration

Early 19th Century headphones, illustration

Brain shaped circuit board and brain

Human brain on brain-shaped circuit board

Human brain on brain-shaped circuit board

Measuring speed of sound, illustration

Electric switch and circuit symbol, illustration

Electric motor and circuit symbol, illustration

Fixed resistor and circuit symbol, illustration

Light-dependent resistor and circuit symbol, illustration

Simple lighting circuit, illustration

Two lamps connected in series, illustration

Two lamps connected in parallel, illustration

Two lamps connected in parallel, circuit diagram

Aircraft toilet system, illustration

Firework structure, illustration

Sound waves human ear, illustration

Moving coil loudspeaker, diagram

Moving coil loudspeaker, diagram

Mass balance, illustration

Electric cell and circuit symbol, illustration

Loudspeaker mechanism, illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Electric car, cutaway illustration

Louis Breguet, French physicist

Louis Breguet

Radio icon

Radio icon

Radio icon

Johann Philipp Reis, German inventor

Cross section of a transistor, illustration

Organ-on-a-chip, illustration

Organ-on-a-chip, illustration

AC generator, illustration

Demonstration of sound carried by air

Microbubbles in medical imaging, conceptual image

Otto von Guericke, German physicist, 19th C illustration

Electromagnetic thruster, illustration

Passenger aircraft air circulation system

19th Century teleprinter, illustration

Human brain on brain-shaped circuit board

Deep brain stimulation, illustration

Deep brain stimulation, illustration

19th Century nitroglycerine machine, illustration

19th Century nitroglycerine laboratory, illustration

Making nitroglycerine, 19th Century illustration

19th Century nitroglycerine laboratory, illustration

19th Century nitroglycerine machine, illustration

Making nitroglycerine, 19th Century illustration

Torch, illustration

Tesla's Wardenclyffe Tower laboratory, illustration

Ammeter and circuit symbol, illustration

Lamp, cell and ammeter connected in series, illustration

Charles de Changy, French engineer

19th Century lighthouse, historic artwork

E-medicine, conceptual image

Seismic imaging with hydrophones

Seismic imaging with hydrophones

Zinc oxide nanoparticles, illustration

Thermonuclear warhead

Werner Siemens, German electrical engineer

Werner Siemens, German electrical engineer

Werner Siemens, German electrical engineer

E-medicine, conceptual illustration

E-medicine, conceptual illustration

Giant magnetoresistance in phthalocyanine

The analysis of sound frequencies by the basilar membrane.

Larynx anatomy, artwork

Domestic lighting circuit, illustration

Circuit breaker, diagram

Residual current circuit breaker, diagram

Petrol engine, illustration

Drug delivery microbubbles, illustration

Drug delivery microbubbles, illustration

Reflecting telescope, illustration

Measuring gravity, illustration

Giovanni Caselli, Italian physicist

Theodose Du Moncel, French physicist

DC generator, illustration

Typical gasoline engine cooling system.

Data transmission, conceptual illustration

First nuclear submarine Nautilus, artwork

XENON dark matter detector, illustration

Blasting trigger mechanism, artwork

Fairground steam engine, illustration

Oscilloscope displaying sound wave signal, illustration

Medical imaging microbubble, illustration

Medical imaging microbubble, illustration

Boiling water nuclear reactor

Ultrasound device, illustration

Carbon capture technology, illustration

Geothermal district heating, artwork

Green energy, conceptual illustration

Green energy, conceptual illustration

Green energy, conceptual illustration

3D printing, artwork

3D printer, conceptual artwork

Nanorobots, artwork

Genetic modification, conceptual image

Trieste bathyscaphe, 1963 illustration

19th Century ice cube machine, illustration

19th Century ice-making machine, illustration

19th Century phosphorous oven, illustration

19th Century ice cube machine, illustration

19th Century ice-making machine, illustration

19th Century phosphorous oven, illustration

Vatican Observatory, 19th Century illustration

Herschel's 40 foot telescope, 19th Century illustration

Diaphragm contraceptive in the uterus, illustration

The components of a scanning electron microscope (SEM).

Mass spectrometer and data chart, illustration

Headphones, illustration

Electronic components, illustration

Electric switch and circuit symbol, illustration

Light-emitting diode and circuit symbol, illustration

Electrolytic capacitor and circuit symbol, illustration

Two lamps connected in series, circuit diagram

Hydrogen fuel cell, illustration

Solar power, conceptual illustration

Electroplating apparatus, 19th century

Radio communications tower

Radio communications tower

Radio communications tower

Radio communications tower

Radio waves and transmission tower

Radio communications tower

Radio communications tower

Radio communications tower

Radio communications tower

Frequency and amplitude modulation, illustration

Gustav Froment, French electrical engineer

Gustav Froment, French electrical engineer

Lighthouse in a storm, historical artwork

Magneto-electric machine, 19th century illustration

Bell telephone, 19th century

Hercule-Progres turbine, illustration

Synaesthesia, conceptual illustration

Fission bomb designs

3D printed dinosaur, conceptual image

Carl Von Steinheil, German physicist

Georges-Louis Le Sage, Swiss physicist

Carl Von Steinheil, German physicist

Mechanical watch interior, illustration

Mechanical watch interior, illustration

An active-matrix thin-film transistor (TFT) liquid crystal display. A TFT is associated with each pixel of the display screen.

Turbines, illustration

Radio, artwork

Georges Leclanche's dry cell and its later variations, zinc chloride and alkaline cells, are batteries commonly used worldwide.

Modern version of the Leclanche cell. This heavy-duty zinc-carbon primary battery is a dry cell with an immobilized electrolyte.

Cutaway view of a typical construction of a miniature power cell, as in a zinc-silver oxide or zinc-mercuric oxide system.

Automotive-type lead-acid battery, a storage battery that holds its charge for a long time and can be recharged.

Electric bar heater, illustration

Computer circuit board

Microbubbles, illustration

Microbubbles, illustration

Microbubbles, illustration

Radio communications tower

A fuel cell (actually a group of cells) has essentially the same kinds of components as a battery.

Icon Cogs on white circle with a long shadow

Franklin's kite experiment, illustration

NOT logic gate, diagram

OR logic gate, diagram

AND logic gate, diagram

NOR logic gate, diagram

NAND logic gate, diagram

XOR logic gate, diagram

XNOR logic gate, diagram

Very-high-temperature reactor, diagram

Very-high-temperature reactor, diagram

Cross section of a V-type engine.