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What is the terminal velocity of a coppe...

What is the terminal velocity of a copper ball of radius 2.0 mm, which falls through an oil tank? Given that density of oil = `1.5 xx 10^(3)` kg `m^(-3)`, density of copper `= 8.9 xx 10^(3) kg m^(-3)` and viscosity of oil is 0.99 kg `m^(-1)s^(-1)`.

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