1
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
$$\sqrt{2} \mathrm{~W}$$
2
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
3
MHT CET 2021 24th September Morning Shift
+1
-0

A thin metal disc of radius 'r' floats on water surface and bends the surface downwards along the perimeter making an angle '$$\theta$$' with the vertical edge of the dsic. If the weight of water displaced by the disc is '$$\mathrm{W}$$', the weight of the metal disc is [T = surface tension of water]

A
$$2 \pi \mathrm{r} \cos \theta+W$$
B
$$\mathrm{W}-2 \pi \mathrm{T} \cos \theta$$
C
$$\mathrm{2 \pi r T+W}$$
D
$$2 \pi \mathrm{T} \cos \theta-\mathrm{W}$$
4
MHT CET 2021 24th September Morning Shift
+1
-0

The work done in blowing a soap bubble of volume '$$\mathrm{V}$$' is '$$\mathrm{W}$$'. The work required to blow a soap bubble of volume '$$2 \mathrm{~V}$$' is [$$\mathrm{T}=$$ surface tension of soap solution]

A
$$2^{2 / 3} \mathrm{~W}$$
B
$$2 \mathrm{~W}$$
C
$$\mathrm{W}$$
D
$$2^{1 / 3} \mathrm{~W}$$
EXAM MAP
Medical
NEET