demonstrations:3_oscillations_and_waves:sound_waves:decibel_meter:start
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- Date:
- 2012/02/01 11:41
- Filename:
- img_2424.1548791800.jpg
- Format:
- JPEG
- Size:
- 108KB
- Width:
- 1024
- Height:
- 768
- Camera:
- Canon Canon PowerShot S50
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- Super Capacitor