Physics
When the milk is churned vigorously the cream from it is separated out due to

Gravitational force
Frictional force
Centrifugal force
Centripetal force

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Physics
The term ''equinox' means

The axis of the Earth around which it rotates
The path which the Earthtakes around the Sun
The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon
When the day and night are of equal duration

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