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Oil spreads on cold water but remains as...

Oil spreads on cold water but remains as drop on hot water.

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Assertion: Oil drops spread on cold water and remain as a drop on hot water. Reason : Surfnce tension of oil is less than cold water and more than that of hot water.

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Oil drop may……. On a hot water.

SL ARORA-Mechanical Properties of fluids-Exercise
  1. A mercury barometer always reads less than actual pressure.

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  2. A large force is required to draw apart normally two glass plates encl...

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  3. Oil spreads on cold water but remains as drop on hot water.

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  4. Tow soap bubbles A and B are formed at the two open ends of a tube. Th...

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  5. It becomes easier to spray the water in which some soap is dissolved. ...

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  6. does angle of contact depends on the inclination of the solid surface ...

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  7. While sewing, a person often wets the end of a thread before, trying t...

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  8. The force required by a man to move his legs immersed in water is smal...

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  9. Explain why (a). The angle of contact of mercury with galss is obtus...

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  10. Whan air is blown in between two balls suspended close to each other, ...

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  11. Define the term fluid.

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  12. Modulus of rigidity of a liquid

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  13. Define density. Is it a scalar or vector quantity ? Give its unit and ...

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  14. State Pascal's law. How can it be demonstrated?

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  15. State the principle of working of hydraulic press.

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  16. Name two practical applications of Pascal's law.

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  17. ATMOSPHERIC PRESSURE

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  18. Deoes the atmospheric pressure vary with the height above the earth's ...

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  19. What is meant by one torr of pressure ?

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  20. What is one bar of pressure ?

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