Physics
Surface tension in a liquid is due to :

Cohesive force between molecules
Gravitational force between molecules
Electrical force between molecules.
Adhesive force betweenmolecules

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Physics
Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

at the top of Mt. Everest
at sea level
in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level
at a place in a valley below sea level

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