Physics
A spherical ball made of steel when dropped in mercury container

Will dissolve in mercury
Sink in mercury
Will be on the surface of mercury
Will be partly immersed mercury

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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
All listed here
If a part of the integrated circuit fails the entire circuit is simply replaced

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