A ring is cut from a platinum tube having 10 cm internal and 11 cm external diameter. It is supported horizontally from a pan of balance o that it comes in contact with water in a glass vessel. What is the surface tension of water if an extra, 4. 752gram weight is required to pull it away from water? ( g= 10 m//s^(2) ):

A ring is cut from a platinum tube having 10 cm internal and 11 cm ext

1.	A ring is cut from a platinum tube having 10 cm internal and 11 cm external diameter. It is supported horizontally from a pan of balance o that it comes in contact with water in a glass vessel. What is the surface tension of water if an extra, 4. 752gram weight is required to pull it away from water? ( g= 10 m//s^(2) ):
Answer» `7.2 XX 10^(-2) "N/m"` `72 "N/m"` `14.4 xx 10^(-2) "N/m"` `144 "N/m"` ANSWER :A