MHT CET 2025 19th April Evening Shift | Fluid Mechanics Question 13 | Physics

' $n$ ' small water drops of same size (radius $r$ ) fall through air with constant velocity V. They coalesce to form a big drop of radius R . The terminal velocity of the big drop is

$\frac{\mathrm{VR}^2}{\mathrm{r}^2}$

$\frac{\mathrm{Vr}^2}{\mathrm{R}^2}$

$\frac{V R}{r}$

$\frac{\mathrm{Vr}}{\mathrm{R}}$

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

A small metal sphere of density $\rho$ is dropped from height $h$ into a jar containing liquid of density $\sigma(\sigma>\rho)$. The maximum depth up to which the sphere sinks is (Neglect damping forces)

$\frac{\rho}{\rho-\sigma}$

$\frac{\mathrm{h} \sigma}{(\rho-\sigma)}$

$\frac{\sigma}{(\rho-\sigma)}$

$\frac{\mathrm{h} \rho}{(\rho-\sigma)}$

MHT CET 2025 19th April Evening Shift

MCQ (Single Correct Answer)

-0

Water is flowing steadily in a river. A and B are the two layers of water at heights 40 cm and 90 cm from the bottom. The velocity of the layer A is $12 \mathrm{~cm} / \mathrm{s}$. The velocity of the layer B is

$15 \mathrm{~cm} / \mathrm{s}$

$21 \mathrm{~cm} / \mathrm{s}$

$27 \mathrm{~cm} / \mathrm{s}$

$36 \mathrm{~cm} / \mathrm{s}$

MHT CET 2025 19th April Morning Shift

MCQ (Single Correct Answer)

-0

A liquid rises to a height of 2.4 cm in a glass capillary P. Another glass capillary Q having diameter $80 \%$ of capillary $P$ is immersed in the same liquid. The rise of liquid in capillary $Q$ is

2.4 cm

3.4 cm

3 cm

2.5 cm

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