Why do straws float in cups with soda but not in water? Is it the carbonation? If so, why?
Also, why does soda sometimes come out of the straw after drinking from the straw? Is it a vacuum that hasn’t been properly unsealed?
In: Physics
Even when the soda is flat (the CO2 is gone) straws will still float in some sodas because the sugared syrup in the water makes it thicker than normal water, and therefore slightly more dense than the plastic in the straw. The lighter material floats to the top.
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