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Question : 39 of 100
Marks:
+1,
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Solution:
The pressure is the force acting on a unit area.
​P=F/A ( P= Pressure, F= Force, A= Area)
S.I Unit: Pascal
Surface Tension is defined as the force acting normally on the unit area of the surface.
- Surface Tension is the force exerted by a liquid surface to reduce its surface area to a minimum value.
- It mainly occurs due to cohesion.
- The spherical shape of the raindrop is due to the surface tension.
- Insects can walk over the water surface due to the effect of surface tension.
- The surface tension of the water can be reduced by adding detergents to it.
- Surface tension is inversely proportional to the pressure.
- Surface tension is inversely proportional to the temperature.
Viscosity is the internal frictional force acting between parallel layers of a liquid.
Torque is the capability of rotating objects around a fixed axis.
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