found to weight 0.95 gram. What is the surface tension of the liquid?

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In measuring the surface tension of a
liquid (drop weight method), 20 drops of
the liquid (r = 0.2cm) falling apart from
the tip whose diameter is 0.4 cm were
found to weight 0.95 gram. What is the
surface tension of the liquid?
Transcribed Image Text:In measuring the surface tension of a liquid (drop weight method), 20 drops of the liquid (r = 0.2cm) falling apart from the tip whose diameter is 0.4 cm were found to weight 0.95 gram. What is the surface tension of the liquid?
Expert Solution
Step 1 use Formula

 W = 2πrγ

W : mass

r : radius

y : surface tension

Therefore, 

y = 0.94/(2*3.14*0.2)

y = 0.7484 g/cm

 

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