Physics
Air moves from the region where the air ________

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

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Physics
Why does bleeding occur through the nose in high mountainous regions ?

The blood pressure of a person increases at high altitudes
The blood pressure fluctuates and finally decreases drastically
The pressure of blood in capillaries is greater than the outside pressure
The pressure at high altitudes is greater than that on the plains

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