MHT CET 2023 13th May Morning Shift | Fluid Mechanics Question 9 | Physics

A large number of water droplets each of radius '$$t$$' combine to form a large drop of Radius '$$R$$'. If the surface tension of water is '$$T$$' & mechanical equivalent of heat is '$$\mathrm{J}$$' then the rise in temperature due to this is

$$\frac{2 \mathrm{~T}}{\mathrm{rJ}}$$

$$\frac{3 \mathrm{~T}}{\mathrm{RJ}}$$

$$\frac{3 T}{J}\left(\frac{1}{r}-\frac{1}{R}\right)$$

$$\frac{2 \mathrm{~T}}{\mathrm{~J}}\left(\frac{1}{\mathrm{r}}-\frac{1}{\mathrm{R}}\right)$$

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

Twenty seven droplets of water each of radius $$0.1 \mathrm{~mm}$$ merge to form a single drop then the energy released is

$$1.6 \times 10^{-3} \mathrm{~J}$$

$$1.6 \mathrm{~J}$$

$$1600 \mathrm{~J}$$

$$1.6 \times 10^{-7} \mathrm{~J}$$

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

Venturimeter is used to

measure liquid pressure.

measure liquid density.

measure rate of flow of liquids.

measure surface tension.

MHT CET 2023 13th May Morning Shift

MCQ (Single Correct Answer)

-0

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

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

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

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

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

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