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Bubble in water have ….. Free surface...

Bubble in water have ….. Free surface

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Bubble in air have …… free surface

Rain drop have ……. Free surface

An air bubble inside water. The refractive index of water is 4/3 . At what distance from the air bubble should a point object be placed so as to form a real image at the same distance from the bubble:-

A cube with mass m completely wettable by water floats on the surface of water each side of the cube is a what is the distance h between the lower face of cube and the surface of the water if surafce tension is S. Take densities of water as rho_(w) take angle of contact is zero.

The excess pressure inside one soap bubble is three times that inside a second soap bubble, then the ratio of their surface area is:

The length of needle foating on the surface of water is 1.5 cm the force in addition to its weight required to lift the needle from water surface will be (surface tension of water =7.5N//cm )

An air bubble is lying just below the surface of water. The surface tension of water is 70xx10^(-3)Nm^(-1) and atmospheric pressure is 1.013xx10^(5)Nm^(-2) . If the radius of bubble is 1mm, then the pressure inside the bubble will be-

Find the pressure in a bubble of radius 0.2 cm formed at the depth of 5cm from the free surface of water . The surface tension of water is 70 dyne cm^(-1) and its density is 1gcm^(-3) . Atmospheric pressure is 10^(6) dyne cm^(-2) .The gravitational acceleration is 980cms^(-2) .

Soap bubble form in air .The excess pressure inside a soap bubble is twice the excess pressure in second bubble .The first bubble has n times the volume of the second bubble , finf n ….

KUMAR PRAKASHAN-MECHANICAL PROPERTIES OF FLUIDS -SECTION-A Try Yourself (VSQs)
  1. What is the effect of increasing temperature on surface tesion ?

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  2. Define angle of contact .

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  3. Give reason : Wing of duck cannot wet in water

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  4. Liquid is stick to the glass then angle of contact for liquid glass wi...

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  5. The angle of contact between mercury and glass is ……. Angle

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  6. The cohesive force between the molecules of liquid is more than the co...

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  7. The cohesive force between the molecules of liquid is less than the co...

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  8. A large pressure exerted on the surface of liquid having shape of …….....

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  9. Bubble in water have ….. Free surface

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  10. Bubble in air have …… free surface

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  11. Rain drop have ……. Free surface

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  12. Write the equation of excess pressure (pressure difference) for the bu...

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  13. At a depth of 1000m in an ocean (a) What is the absolute pressure? (b)...

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  14. What is capillary ?

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  15. Give two practical illustrations of caplilary.

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  16. When the capillary is kept in water , water ….. In capillary while it ...

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  17. Write the formula for height of liquid column in capillary .

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  18. Smaller the radius of the capillary tube ,….. The height of the colum...

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  19. If meniscus is convex then liquid ……. In capillary and it is concave t...

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  20. Give reason : Lighting of lamp is due to wick of lamp .

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