A straight piece of wire 5 cm long is placed horizontally on the surface of water and gently pulled up. It is found that a force of 7 xx 10^(-3) N in addition to weight of wire is required for that purpose. The surface tension of water is

A straight piece of wire 5 cm long is placed horizontally on the surfa

1.	A straight piece of wire 5 cm long is placed horizontally on the surface of water and gently pulled up. It is found that a force of 7 xx 10^(-3) N in addition to weight of wire is required for that purpose. The surface tension of water is
Answer» `7 xx 10^(-2)N//m` `7 xx 10^(-1) N//m` `7 xx 10^(-3) N//m` `3.5 xx 10^(-2) N//m` ANSWER :A