13.
In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow?

15.
A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation?

16.
The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its

18.
The speed of a sound wave in a gas is analogous to the speed of

19.
Newton's law of viscosity relates the

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