Physics
Which of the following events occurred first ?

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

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Physics
Thermohaline circulation is mainly due to

Winds causing circulation of ocean water
Warm water being added to the ocean due to industial waste
Cold, dense ocean water sinking and warmer water replacing it
Warmer, less dense water sinking in the ocean and cold water replacing it

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