Natural phenomena and technical applications

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Thermal radiation and greenhouse effect
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Electrostatic tip-shape effect

Electrostatic tip-shape effect

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We determine our heart frequency
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Measuring reading skills with Cobra4
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Doppler sonography

Doppler sonography

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Conversion of light into motion with a solar cell
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Conversion of mechanical energy into electrical energy
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Conversion of thermal energy into electrical energy
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Conversion of thermal energy into motion
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Driving a water wheel

Driving a water wheel

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Influence of surface on the absorption of solar energy
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Influence of insulation on the absorption of solar energy
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Heating water in a solar collector
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Thermal insulation of houses and thermal imaging
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Thermal voltage and temperature

Thermal voltage and temperature

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Peltier effect: cooling engine

Peltier effect: cooling engine

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Peltier effect: heat pump

Peltier effect: heat pump

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Using ambient heat with the aid of a Peltier heat pump
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Influence of surface area of solar cell on voltage and current
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Voltage and current in a series connection of solar cells
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Voltage and current in a parallel connection of solar cells
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The solar cell as a power source for LED
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Solar-dark characteristic curve

Solar-dark characteristic curve

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The characteristic current-voltage curves of solar cells
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Storage of the electric energy from a solar cell in a capacior
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Electrical energy from wind energy
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Influence of wind speed

Influence of wind speed

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Influence of wind direction

Influence of wind direction

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Wind energy under load

Wind energy under load

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Influence of number of rotor blades
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Current-voltage characteristic of the wind wheel
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Pumping water using solar energy
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Pumping water using wind energy

Pumping water using wind energy

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Running water drives a generator
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Heating water using a parabolic trough
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Model of a parabolic trough field
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Generation of electric energy using a PEM fuel cell
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Solar-hydrogen system

Solar-hydrogen system

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Wind-hydrogen system

Wind-hydrogen system

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Characteristic curve of a PEM electrolyser
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Faraday efficiency and energetic efficiency of a PEM electrolyser
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Current-voltage characteristic of a PEM fuel cell
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Faraday and energetic efficiencies of a PEM fuel cell
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The efficiency of a electrolyser-fuel cell system
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current-voltage characteristic of an air breathing fuel cell
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Voltage and current in a series and parallel connection of solar cells
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Operating a LED with solar energy
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The solar cell as a diode

The solar cell as a diode

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The characteristic current-voltage curves of a solar cell
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Influence of number of rotor blades
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Storage of electric energy from wind energy with an accumulator
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Storage of the electric energy won from wind energy in a capacitor
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Current-voltage characteristic of a wind wheel
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Pumping water using solar energy
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Pumping of water using wind energy
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Running water driving a generator - determination of the power
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Heating water using a parabolic trough
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Model of a field of a parabolic troughs
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Faraday efficiency and energetic efficiency of a PEMelectrolyser
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Wind hydrogen system

Wind hydrogen system

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Current-voltage characteristic and power of a PEM fuel cell
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Faraday efficiency and energetic efficiency of a PEM fuel cell
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Efficiency of an electrolyseur-fuel cell-system
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Optical illusions

Optical illusions

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Sound as a sine wave

Sound as a sine wave

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Sound and noise

Sound and noise

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Lower and upper hearing threshold
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Directional hearing

Directional hearing

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Beat frequency

Beat frequency

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Measurement of sound velocity

Measurement of sound velocity

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Bone conduction

Bone conduction

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Noise level traffic lights

Noise level traffic lights

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Scales and intervals

Scales and intervals

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Fundamental, overtone and tone colour
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Determination of the earth's magnetic field
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We investigate our heartbeat - electrocardiography
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Elektrocardiography with Cobra SMARTsense
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We investigate our muscular power - electromyography
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We measure our eye movements - electrooculography
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We determine our heart frequency with Cobra SMARTsense
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Colours of objects

Colours of objects

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Mode of operation of the human eye (normal vision)
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Short-sightedness and its correction
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Long-sightedness an its correction
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Defective accommodation  in old age and its correction
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Optical fibre communication

Optical fibre communication

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