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

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

ANSWER DOWNLOAD EXAMIANS APP

Physics
Which of the following events occurred first ?

Marconi first tranmitted a wireless signal
Albert Einstein propounded the General Theory of Relativity
Madame Marie Curie became the first woman Nobel Prize winner
Max Planck unveiled the Quantum Theory

ANSWER DOWNLOAD EXAMIANS APP