Question 332: Properties of Matter

Question

A rectangular film of liquid is extended from (4 cm $$ 	imes $$ 2 cm) to (5 cm $$ 	imes $$ 4 cm). If the work done is 3 $$ 	imes $$ 10$$-$$4 J, the value of the surface tension of the liquid is

Accepted Answer

We have d = 2700 m, ÃÂ = 10
3
kg/m3, compressibility = 45.4 ÃÂ 10
Ã¢ÂÂ11
/pascal
Now the pressure at bottom of ocean is
p = ÃÂgd
= 10
3
ÃÂ 10 ÃÂ 2700
= 27 ÃÂ 10
6
Pa
Hence, fractional compression
= 45.4 ÃÂ 10
Ã¢ÂÂ11
Ã¢ÂÂÃÂ 27 ÃÂ 10
6
= 1.2 ÃÂ 10
Ã¢ÂÂ2
= 0.125 N m
$$-$$1

Answer

0.250 N m$$-$$1

Answer

0.125 N m$$-$$1

Answer

0.2 N m$$-$$1

Answer

8.0 N m$$-$$1

Properties of Matter

A rectangular film of liquid is extended from (4 cm $ \times 2 cm) to (5 cm \times 4 cm). If the work done is 3 \times 10-$4 J, the value of the surface tension of the liquid is

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