Physics
The cause for the Tsunami, as deduced by the seismologists, is

Sudden change in the monsoon wind
Low pressure trough in the ocean
Deformation of sea floor and vertical displacement of water
Gravitational pull of the moon

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Physics
Absolute Zero is defined as

At which the volume becomes zero
At which liquid Helium boils
At which water boils at 298K
The temperature at which all molecular motion ceases

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