Physics
A liquid disturbed by stirring comes to rest due to

Surface tension
Viscosity
Density
Centripetal force

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Physics
A transformer

Converts AC voltage to D.C. voltage
Converts electrical energy into mechanical energy
Converts DC to AC
Is used to decrease or increase AC voltage

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Physics
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of same frequency travelling in the opposite direction
Two waves of the same speed superposing
Two waves of same frequency travelling in the same direction

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Physics
An integrated circuit is more advantages than a coventional circuit because

They make the electric equipments more reliable and easier for servicing
A faulty part of a conventional circuit may be difficult to locate and repair
If a part of the integrated circuit fails the entire circuit is simply replaced
All listed here

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