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Q.

A air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s-2. The density of water is 1 g/cc and water offers negligible drag force on the bubble. The mass of the bubble is  g=980cm/s2

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a

1.52 g

b

4.51 g

c

3.15 g

d

4.15 g

answer is D.

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Detailed Solution

B-mg = ma

m=Bg+a

=Vρωgg+a

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