An air bubble of radius 1 cm in water has an upward acceleration 9.8 cm s−2 . The density of water is 1 gm cm−3 and water offers negligible drag force on the bubble. The mass of the bubble is ( g=980 cm/s2 )
(1) 4.51 gm
(2) 3.15 gm
(3) 4.15 gm
(4) 1.52 gm