Define (i) surface tension (ii) viscosity. Give their units.

1.	Define (i) surface tension (ii) viscosity. Give their units.
Answer» (i) The force acting parallel to the surface and perpendicular to a line of unit length anywhere in the surface is called surface tension. Its unit is Nm^-1. (ii) The force of friction which one part of the liquid offers to another part of the liquid is called viscosity. Its unit is poise.

Answer»

(i) The force acting parallel to the surface and perpendicular to a line of unit length anywhere in the surface is called surface tension. Its unit is Nm^-1.

(ii) The force of friction which one part of the liquid offers to another part of the liquid is called viscosity. Its unit is poise.

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Define (i) surface tension (ii) viscosity. Give their units.

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