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Manipal Entrance Test 2013 Physics Paper
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© examsnet.com
Question : 2
Total: 60
If value of surface tension of a liquid is 70 dyne/cm, then its value in N/m will be
7
×
10
3
N
∕
m
7
×
10
2
N
∕
m
7
×
10
−
2
N
∕
m
7
0
N
∕
m
Validate
Solution:
The unit dyne/cm is CGS system of unit.
The CGS unit of force is dyne and SI unit is Newton.
Also there are 10
5
dynes in one newton and 100 cm in 1 cm.
∴
70
dynes
cm
=
70
×
10
−
5
10
−
2
=
7
×
10
−
2
N
∕
m
© examsnet.com
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