Properties Of Solids And Liquids Question 376
Question: The maximum force, in addition to the weight required to pull a wire of 5.0 cm long from the surface of water at temperature$ 20^{o}C $ , is 728 dynes. The surface tension of water is
Options:
A) 7.28 N/cm
B)7.28 dyne/cm
C) 72.8 dyne/cm
D)$ 7.28\times 10^{2} $ dyne/cm
Show Answer
Answer:
Correct Answer: C
Solution:
$ T=\frac{F}{2l}=\frac{728}{2\times 5} $
$ T=72.8\ dyne/cm $
