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at the same diameter, an air bubble rises faster in liquid faster than a sand pebble...

at the same diameter, an air bubble rises faster in liquid faster than a sand pebble falls in liquid water. The densities of air water and sand are 1.2,1000,2500 kg/M3 respectively.

Answer True of False whether or not the air buble travels faster. Need help don't understand the theory behind this question

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