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25 August, 13:46

Design an investigation to compare the durability of the three different brands

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  1. 25 August, 15:28
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    Stretch all with a weight.

    e. g. stretch 1, 2 and 3 with a 10g weight. if does not break, proceed with a 20g, the 30g consecutively. last one which holds the heaviest weight is the most durable one.
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