Determine the surface tension forces in case an annular disc of radii $r_{1}$ and $r_{2}$ is placed on the water surface (surface tension of water T = $7 \times 10^{- 2} N / m; π = \frac{22}{7}$ )

4400 dyne

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6600 dyne

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8800 dyne

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2200 dyne

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Solution

The correct option is B
6600 dyne

$F = 2 π (r_{1} + r_{2}) T$
= 6600 dyne

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Similar questions

Q. Determine the surface tension forces in case a plate of radius 10cm is placed on a water surface (surface tension of water =

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Q. An annular disc of radii

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and

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(Surface tension of water

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Determine the surface tension forces in case an annular disc of radii r1 and r2 is placed on the water surface (surface tension of water T = 7×10−2N/m;π=227)

The correct option is B 6600 dyne F=2π(r1+r2)T = 6600 dyne

Determine the surface tension forces in case an annular disc of radii $r_{1}$ and $r_{2}$ is placed on the water surface (surface tension of water T = $7 \times 10^{- 2} N / m; π = \frac{22}{7}$ )

The correct option is B
6600 dyne

$F = 2 π (r_{1} + r_{2}) T$
= 6600 dyne