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Sound: Doppler Effect
This image shows a fragment of twenty seconds experiment of students, with which the Doppler effect can be observed.
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Faraday cage: Demonstration
This fragment of 35 seconds shows a student standing in a Faraday cage, without any danger of electrocution.
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Forces: Ski Jumping
This fragment of 116 seconds shows the power that man can convert when he descends a ramp with skis.
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