A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface of water. If surface tension of water is $0.07 ext{Nm}^{-1}$, then the excess force required to take it away from the surface is:

Question

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface of water. If surface tension of water is $0.07	ext{Nm}^{-1}$, then the excess force required to take it away from the surface is:

Accepted Answer

19.8 mN

Questions

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface of water. If surface tension of water is $0.07\text{Nm}^{-1}$ , then the excess force required to take it away from the surface is:

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A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface of water. If surface tension of water is 0.07Nm−10.07\text{Nm}^{-1}0.07Nm−1, then the excess force required to take it away from the surface is:

Related questions

A thin flat circular disc of radius 4.5 cm is placed gently over the surface of water. If surface of water. If surface tension of water is $0.07\text{Nm}^{-1}$ , then the excess force required to take it away from the surface is: