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The surface tension of water is 72 dyne/...

The surface tension of water is 72 dyne/cm. convert it in SI unit.

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Surface tension `= sigma = 72 ` dyne `//` cm `= ( 72 xx 10^(-5) N )/( 10^(-2)m) = 72 xx 10^(-3) N//m`
Surface energy is numerically equal to the surface tension.
Surface energy `= 72 xx 10^(-3) J //m^(3)`
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ICSE-PROPERTIES OF MATTER-MODULE 2 (SOLVED EXAMPLES)
  1. The surface tension of water is 72 dyne/cm. convert it in SI unit.

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  2. A wire of mass 5 gm is kept horizontally on the surface of water. What...

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  3. A liquid of diameter D breaks up into 64 tiny drops. If the surface te...

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  4. Two mercury drops each of radius r merge to form a bigger drop. Calcul...

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  5. What is the excess pressure inside (i) a drop (ii) a bubble of water o...

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  6. What should be the radius of a water drop so that the excess pressure ...

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  7. A vessel containing mercury has a hole at its bottom. The diameter of ...

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  8. At one end of capillary tube of radius r and length l, there is a soa...

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  9. A capillary tube of inside diameter 1 mm is dipped vertically in a liq...

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  10. A capillary tube of inside diameter 1mm is dipped vertically into wate...

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  11. A capillary tube of length 12 cm and inside diameter 0.033m is dipped ...

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  12. Calculate the work done to increase the radius of a soap bubble from 4...

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  13. Find the work done in spraying a drop of water of 2mm diameter into a ...

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  14. What is the excess pressure inside a bubble of soap solution of radius...

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  15. The excess pressure inside a soap bubble of radius 6mm is balanced by...

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  16. Two soap bubbles one of radius 3cm and other of radius 4cm each coales...

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  17. A small drop of water kept pressed between two glass plates spreads as...

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  18. Two identical spherical soap bubbles collapses. If V is consequent cha...

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  19. Mercury has an angle of contact equal to 140^(0) with soda lime glass....

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  20. Find the heights to which water will in a capillary tube of radius 0.3...

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