Q.

Surface tension of water in the CGS system is 72 dyne/cm.  What is its value in SI units?

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a

0.072Nm

b

0.0072Nm

c

0.72Nm

d

7.2Nm

answer is A.

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Detailed Solution

I dyne =10-5 N 1 cm=10-2 m ∴  72dyne/cm=72×10-510-2Nm=0.072Nm
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Surface tension of water in the CGS system is 72 dyne/cm.  What is its value in SI units?