Physics
When hot-water is sprinkled on a hotter glass tumbler, it breaks because

Glass suddenly expands
Glass suddenly contracts
Glass reacts chemically with water
Water evaporates

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Physics
Air moves from the region where the air ________

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

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