| Sounds accompany the discharges of electricity. A piezoelectric crystal is connected to a light bulb. When the crystal is pressed, the light flashes. | |||
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| Sounds accompany the discharges of electricity. A piezoelectric crystal is connected to a light bulb. When the crystal is pressed, the light flashes. | |||
| Contents | |||
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| Keywords | |||
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| Contained in: | |||
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