MHT CET 2023 12th May Morning Shift | Fluid Mechanics Question 65 | Physics

The excess pressure inside a first spherical drop of water is three times that of second spherical drop of water. Then the ratio of mass of first spherical drop to that of second spherical drop is

1 : 3

1 : 6

1 : 9

1 : 27

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

-0

A liquid drop of radius '$$R$$' is broken into '$$n$$' identical small droplets. The work done is [T = surface tension of the liquid]

$$4 \pi \mathrm{R}^2\left(\mathrm{n}^{\frac{2}{3}}-1\right) \mathrm{T}$$

$$4 \pi R^2\left(n^{\frac{1}{3}}-1\right) T$$

$$4 \pi R^2\left(1-n^{\frac{1}{3}}\right) T$$

$$4 \pi \mathrm{R}^2\left(1-\mathrm{n}^{\frac{2}{3}}\right) \mathrm{T}$$

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

-0

A fluid of density '$$\rho$$' is flowing through a uniform tube of diameter '$$d$$'. The coefficient of viscosity of the fluid is '$$\eta$$', then critical velocity of the fluid is

inversely proportional to '$$\eta$$'

directly proportional to '$$\eta$$'

directly proportional to '$$\mathrm{d}$$'

directly proportional to '$$\rho$$'

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

-0

What should be the diameter of a soap bubble, in order that the excess pressure inside it is $$25.6 \mathrm{~Nm}^{-2}$$ ? [surface tension of soap solution $$\left.=3 \cdot 2 \times 10^{-2} \mathrm{~Nm}^{-2}\right]$$

2 cm

1.5 cm

1 cm

0.5 cm

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