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Pins and nails are made to have ponted e...

Pins and nails are made to have ponted end because

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To make area of contact of pin with the given surface smaller. Due to this, a large pressure will be exerted on the surface and the pin will easily be penetrated inside the surface.
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MODERN PUBLICATION-MECHANICAL PROPERTIES OF FLUIDS-Revision Exercise (Short Answer Questions)
  1. Why mercury is used in barometer instead of water ?

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  2. Why it is painful to walk barefooted on the floor covered with edge pe...

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  3. Pins and nails are made to have ponted end because

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  4. ARCHIMEDES PRINCIPLE

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  5. State the conditions for stable equilibrium for fleating bodies.

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  6. For a freely falling body

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  7. Why is it easier to swim in sea water than in river water?

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  8. What is the cause of viscosity? What are the factors on which the visc...

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  9. State Poiseuille's formula. Derive it with the help of dimensional ana...

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  10. State and prove Stoke's law with the help of dimensional analysis.

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  11. TERMINAL VELOCITY

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  12. Distinguish between streamline and turbulent flows.

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  13. Can two streamlines intersect each other, in a flowing liquid?

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  14. What do you mean by the surface tension of a liquid?

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  15. Explain surface energy. Establish its relation with surface tension.

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  16. Discuss the effect of presence of impurities and the temperature on th...

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  17. How dirty clothes can be cleaned using a detergent in hot water?

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  18. What is Reynold's number ? Give its significance.

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  19. The equation of continuity leads to

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  20. Angle of contact depends on

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