Physics
When a ship enters the sea from a river what will be the effect?

It lowers
It rises a little
It sways
It jolts

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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
None of these
Frost makes the pipes rusty, so they break
Water in the pipes freezes and on freezing water expands, so pipes break

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Physics
It is dangerous to observe Solar eclipse with naked eyes because

Cosmic rays reach eyes more during the eclipse
Ultraviolet radiations from Sun burn our retina
All radiations from sun initiate chemical reactions in eyes
Infrared radiations from sun burn our retina

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