Q.

The force which opposes the relative motion between different layers of liquid or gases is called –

A. Critical Velocity
B. Streamline Flow
C. Terminal Velocity
D. Viscous Force
Answer» D. Viscous Force
Explanation: Critical Velocity – The maximum velocity upto which fluid motion is streamline is called Critical Velocity. Streamline Flow – If velocity of all fluid particles is same all the time then it can be said in streamline flow.
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