Hello,
Force acting on a circular disc placed on the surface of water is given by, F = Surface tension * circumference of circular disc. (Equation 1)
Here, Surface tension = 8t dyne/cm
Circumference = 2 * pie * radius = 10 * pie
Substituting the value obtained above in equation 1, we get:
F = 8t * 10 * pie = 80t * pie dyne
F = 80t * pie dyne (Answer)
Question : Which of the following statements is not correct about surface tension?
Option 1: Surface tension is typically measured in dynes cm.
Option 2: The shape of the water drop is spherical due to surface tension.
Option 3: At room temperature, the surface tension of water is less than ethyl alcohol.
Option 4: The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
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