Properties of matterMedium
Question
A ring is cut from a platinum tube 8.5 cm internal and 8.7 cm external diameter. It is supported horizontally from the pan of a ballance, so that it comes in contact with the water in a glass vessel. If an extra 3.97. If is requruired to pull it away from water, the surface tensi0on of water is
Options
A.72 dyne cm-1
B.70.80 dyne cm-1
C.63.35 dyne cm-1
D.60 dyne cm-1
Solution
(2πr1 + 2πr2) σ = mg
σ = 3.97 × 980
⇒ σ = 72 dyne cm-2
σ = 3.97 × 980 ⇒ σ = 72 dyne cm-2
Create a free account to view solution
View Solution FreeMore Properties of matter Questions
The lower surface of a cube is fixed. On its upper surface, force is applied at an angle of 30o from its surface. The ch...The quantities which have the same dimensions as those of solid angle are:...Surface tension of two liquids (having same densities), $T_{1}$ and $T_{2}$, are measured using capillary rise method ut...A soap bubble in vacuum has a radius of 3 cm and another soap bubble in vacuum has radius of 4 cm. If the two bubbles co...Match List I with List II: List I List II A. Young's Modulus I. $$\frac{\Delta d}{\Delta L}\left( \frac{L}{d} \right)$$ ...