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JEE Main20248 Apr 2024Evening ShiftPhysicsMechanical Properties of FluidsActual

Small water droplets of radius 0.01 ~mm are formed in the upper atmosphere and falling with a terminal velocity of 10 ~cm / s . Due to condensation, if 8 such droplets are coalesced and formed a larger drop, the new terminal velocity will be _____ cm / s .

Correct answer

0

Step-by-step solution

m = mass of small drop M = mass of bigger drop aligned & V_t= 2 9 R^2( - ) g & 8 m=M & 8 r^3=R^3 R=2 R aligned as V _ t R ^2 Radius double so V _ t becomes 4 time 4 10=40 ~cm / s

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