Physics
Air moves from the region where the air ________

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

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Physics
The wall of a dam is broader at the base

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

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