(a) Define surface tension (b) State two methods by which the surface tension of a...
PHYSICS
WAEC 2005
(a) Define surface tension
(b) State two methods by which the surface tension of a liquid can be reduced
Explanation
(a) Surface tension is the property of a liquid which makes its surface behave as though covered by an elastic skin.
(b) The surface tension of a liquid can be reduced by (i) Heating the liquid (ii) Addition of impurities such as oil, alcohol, soap, camphor, kerosene etc.
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