Answers

2015-06-26T18:45:05+08:00
People stir juice in water because if we stir it , it will be easier for it to dissolve

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2015-06-27T18:14:22+08:00
People stir the juice powder in water because if not, it will subside and it will not mix with the water thoroughly. Collision (the term my former teacher used) is needed in order for the water to mix with the juice powder.
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