Question

Rcular frame made of 20 cm long thin wire is floating on the surface of water the surface tension of water is 70 dyne cm calculate the requieed excess of force to separtae this frame of water

Answer 1

★ Aиѕωєr —

The force required to separate the water frame is 0.014 N.

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★ Cσrrєcт Qυєѕтiσи —

A circular frame made of 20 cm long thin wire is floating on the surface of water. The surface tension of water is 70 dyne/ cm .Calculate the required excess of force to separate this frame of water.

★ Giνєи —

Surface tension ( T ) = 70 dyne/cm

Length ( L ) = 20 cm

★ Tσ Fiиd —

The required force to separate the frame of water.

✰Sσℓυтiσи –

$\qquad\qquad\underline{\boxed{\large\bf{T=\dfrac{F}{L}}}}$

❍ Here ,

• T = Surface Tension
• L = length of wire
• F = Force

$\rm{\leadsto F = T\times L}$

$\qquad\rm{\leadsto F = 70 \times 20}$

$\qquad\qquad\rm{\leadsto F = 1400\:dyne\:\:\:\:\:\:\:\:\big\lgroup 1 N = 10^5 dyne\big\rgroup}$

$\qquad\qquad\qquad\rm{\leadsto 1400\times 10^{-5}N}$

$\qquad\qquad\qquad\qquad\rm{\leadsto 0.014\:N}$

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❍ Mσrє Iиfσrмαтiσи —

Surface tension is the property of liquids which allow them to resist an external force.

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