Physics
Friction can be reduced by changing from

Rolling to Sliding
Sliding to Rolling
Dynamic to Static
Static to Dynamic

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Physics
The term ''equinox' means

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
The path which the Earthtakes around the Sun
When the day and night are of equal duration
The axis of the Earth around which it rotates

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