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Tardigrade
Question
Physics
The material of a wire has a density of 1.4 g / cm 3 . If it is not wetted by a liquid of surface tension 44 dyne/cm, then the maximum radius of the wire which can float on the surface of liquid is
Q. The material of a wire has a density of
1.4
g
/
c
m
3
.
If it is not wetted by a liquid of surface tension
44
dyne/cm, then the maximum radius of the wire which can float on the surface of liquid is
2376
221
Bihar CECE
Bihar CECE 2011
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A
28
10
c
m
B
14
10
c
m
C
7
10
c
m
D
0.7
c
m
Solution:
2
T
=
π
r
2
l
d
×
g
r
=
(
π
d
g
2
T
)
=
22
×
1.4
×
980
2
×
44
×
7
=
7
1
c
m
=
7
10
mm