Physics And Measurement Question 272
Question: Surface tension of a liquid is 70 dyne/cm. Its value in SI is
Options:
A) $ 70N/m $
B) $ 7\times {{10}^{-2}}N/m $
C) $ 7\times 10^{2}N/m $
D) $ 7\times 10^{3}N/m $
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ S=70\frac{dyne}{cm}=\frac{70\times 10^{5}N}{{{10}^{-2}}m} $
$ =70\times {{10}^{-3}}N/m. $
