Seudónimo Seudónimo
  • 21-09-2016
  • Physics
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what is three sources of light

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Brooke13419
Brooke13419 Brooke13419
  • 21-09-2016
Sun and light bulb .........................
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IcySlim IcySlim
  • 21-09-2016
natural is sun, stars moon. Humans discovered fire, oil lamps, candles.
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