Physics
Which of the following occurred first ?

Guglielmo Marconi sent out the first wireless signals
Max Planck unveiled the Quantum Theory
Wright Brothers successfully flew an aircraft
Albert Einstein propounded the General Theory of Relativity

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Physics
Air moves from the region where the air ________

Pressure is low to the region where the pressure is high
Humidity is low to the region where the humidity is high
Humidity is high to the region where the humidity is low
Pressure is high to the region where the pressure is low

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