Physics
Water pipes in hilly areas often burst on a cold frosty night, because

The material of which pipes are made contracts due to cold and so breaks
Water in the pipes freezes and on freezing water expands, so pipes break
Frost makes the pipes rusty, so they break
None of these

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Physics
Energy in reflected light :

Does not depends on the angle of incidence
Becomes maximum for angle of incidence equal to 45°
Decreases with the increase in angle of incidence
Increases with the increase in angle

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

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

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