Two spherical raindrops of equal size are falling vertically through air with a terminal velocit...

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Two spherical raindrops of equal size are falling vertically through air with a terminal velocity of \( 1 \mathrm{~m} / \mathrm{s} \). What would be the terminal speed if these two drops were to coalesce to form a large spherical drop?
(a) \( 2.1 \mathrm{~m} / \mathrm{s} \)
(b) \( 1.58 \mathrm{~m} / \mathrm{s} \)
(c) \( 2.21 \mathrm{~m} / \mathrm{s} \)
(d) \( 2.34 \mathrm{~m} / \mathrm{s} \)
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