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2 thoughts on “Density of a coin experiment

  1. SUDIP BARMAN says:

    Luis excelente video, saludos desde El Salvador...siempre pendientes de tus vГ­deos

  2. Rakesh Khilery says:

    Btw the emu and kangaroo represent moving forwards because they are the only animals in Australia that can’t go backwards while facing forwards.


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