Photoelectric EffectHard
Question
A spherical drop of water has 1mm radius. If the surface tension of water is 70 × 10-3N/m then the difference of pressures between inside and outside of the spherical drop is:
Options
A.140N/m2
B.140N/m
C.35Nm2
D.none of these
Solution
Excess pressure, ᐃp = 
= 140newton / m2
= 140newton / m2Create a free account to view solution
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