1
MHT CET 2021 24th September Evening Shift
+1
-0

'n' small drops of same size fall through air with constant velocity $$5 \mathrm{~cm} / \mathrm{s}$$. They coalesce to form a big drop. The terminal velocity of the big drop is

A
$$7 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
B
$$5 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
C
$$3 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
D
$$9 \mathrm{n}^{2 / 3} \mathrm{~cm} / \mathrm{s}$$
2
MHT CET 2021 24th September Evening Shift
+1
-0

Pressure inside two soap bubbles are 1.01 atm and 1.03 atm. The ratio between their volumes is (Pressure outside the soap bubble is 1 atmosphere)

A
9 : 1
B
27 : 1
C
81 : 1
D
3 : 1
3
MHT CET 2021 24th September Evening Shift
+1
-0

If the work done in blowing a soap bubble of volume '$$\mathrm{V}$$' is '$$\mathrm{W}$$', then the work done in blowing a soap bubble of volume '$$2 \mathrm{~V}$$' will be

A
$$2 \mathrm{~W}$$
B
$$(4)^{1 / 3} \mathrm{~W}$$
C
$$\mathrm{W}$$
D
$$\sqrt{2} \mathrm{~W}$$
4
MHT CET 2021 24th September Morning Shift
+1
-0

A glass tube of uniform cross-section is connected to a tap with a rubber tube. The tap is opened slowly. Initially the flow of water in the tube is streamline. The speed of flow of water to convert it into a turbulent flow is [radius of tube $$=1 \mathrm{~cm}, \eta=1 \times 10^{-3} \frac{\mathrm{Ns}}{\mathrm{m}^2}, R_n=2500$$ and density of water $$=10^3 \mathrm{~kg} / \mathrm{m}^3$$]

A
0.15 m/s
B
0.125 m/s
C
0.3 m/s
D
0.2 m/s
EXAM MAP
Medical
NEET