MHT CET 2023 13th May Morning Shift | Fluid Mechanics Question 12 | Physics

The fundamental frequency of a sonometer wir carrying a block of mass '$$M$$' and density '$$\rho$$' is '$$n$$' Hz. When the block is completely immerse in a liquid of density '$$\sigma$$' then the new frequency will be

$$\mathrm{n}\left[\frac{\rho-\sigma}{\rho}\right]^{\frac{1}{2}}$$

$$\mathrm{n}\left[\frac{\rho-\sigma}{\sigma}\right]^{\frac{1}{2}}$$

$$\mathrm{n}\left[\frac{\rho}{\rho-\sigma}\right]^{\frac{1}{2}}$$

$$n\left[\frac{\sigma}{\rho-\sigma}\right]^{\frac{1}{2}}$$

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

Eight small drops of mercury each of radius '$$r$$', coalesce to form a large single drop. The ratio of total surface energy before and after the change is

2 : 1

1 : 1

1 : 4

1 : 8

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

A spherical metal ball of radius '$$r$$' falls through viscous liquid with velocity '$$\mathrm{V}$$'. Another metal ball of same material but of radius $$\left(\frac{r}{3}\right)$$ falls through same liquid, then its terminal velocity will be

$$\frac{\mathrm{V}}{3}$$

$$\frac{V}{4}$$

$$\frac{\mathrm{V}}{6}$$

$$\frac{V}{9}$$

MHT CET 2023 12th May Evening Shift

MCQ (Single Correct Answer)

-0

Select the WRONG statement from the following. In a streamline flow

velocity of a fluid at a given point is never constant.

velocity is smaller than critical velocity.

layers are always parallel.

the particles do not move in random direction.

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