Physics
Fat can be seperated from milk in a cream seperator because of :

Cohesive Force
Centripetal Force
Gravitational Force
Centrifugal Force

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

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

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