Physics
Inside an aeroplane, flying at a high altitude,

normal atmospheric pressure is maintained by the use of air pumps.
normal humidity and partial vacuum are maintained.
the pressure inside is less than the pressure outside.
the pressure is the same as that outside.

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Physics
Which of the following events occurred first ?

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

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