A sphere of radius 10 cm and density 500kg/m3 is under water of density 1000kg/m3. The acceleration of the sphere is 9.80m/s2 upward. Viscosity of water is 1.0 centipoises. If g=9.81m/s2, the velocity of sphere is:
A
9 m/s
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B
10 m/s
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C
11 m/s
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D
12 m/s
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