Saved Bookmarks
| 1. |
The energy of the free surface of a liquid drop is 5π times the surface tension of the liquid. Find the diameter of the drop in C.G.S. system. |
|
Answer» Given : E = 5πT To find : Diameter of the drop (d) in C.G.S. system Formula : ΔA = 4πr2 ∴ E = 4πr2T ∴ 5πT = 4πr2T ∴ 4r2 = 5 ∴ r = \(\sqrt{\frac54}\) = \(\frac{\sqrt5}{2}\) ∴ d = 2r = \(\sqrt{5}\) = 2.236 cm Diameter of the drop is 2.236 cm. |
|