Physics, asked by rishitabisht2002, 3 months ago

A wire frame 5 cm in length forms a liquid film.
Calculate the surface tension of the liquid if the
net force lifting the frame is 7.5 x 10-2 N.​

Answers

Answered by nirman95
1

Given:

  • Net force = 7.5 × 10^(-2) N.
  • Length = 5 cm

To find:

  • Surface tension of the liquid ?

Calculation:

Surface tension on the surface of any liquid is defined as the force per unit length. Otherwise it can also be defined as the surface energy per unit surface area.

  • Let surface tension be T :

T =  \dfrac{force}{length}

 \implies T =  \dfrac{7.5 \times  {10}^{ - 2} }{( \dfrac{5}{100}) }

 \implies T =  \dfrac{7.5 \times  {10}^{ - 2} }{0.05}

 \implies T =  \dfrac{7.5 \times  {10}^{ - 2} }{5 \times  {10}^{ - 2} }

 \implies T =  \dfrac{7.5 }{5 }

 \implies T = 1.5 \: N/m

So, surface tension of liquid is 1.5 N/m.

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