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

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Physics
The wall of a dam is broader at the base

To withstand pressure that is increased with atmospheric pressure
Because streamlining is required
To withstand pressure that increases with depth
To withstand pressure that increases in a horizontal plane

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