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Byju's Answer
Standard VI
Mathematics
Area of Square
A soap film i...
Question
A soap film is formed in a rectangular frame of length
7
×
10
−
2
m
when it is dipped in soap solution. A weight of
0.4
×
10
−
3
k
g
is required, to pull the frame. Surface tension of the soap solution is
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Solution
Length of rectangular frame
7
c
m
=
0.07
m
Extra weight added is
0.4
×
10
−
3
k
g
Surface tension is given by
0.146
=
0.4
×
10
−
3
×
9.81
6
=
0.028
N
M
−
1
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0
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