Physics
When milk is churned, the cream separates from it due to:

Viscous forces
Frictional force
Centrifugal force
Gravitational force

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Can be of any shape
Should be made of a good conductor like copper with sharp-pointed edges
Should be in the form of a vertical rod
Should be made of a good conductor but can be of any shape

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Physics
Why two thin shirts can keep us warmer than a single thick shirt in winter ?

Air layer between two shirts behaves like insulating media
Air layer between two shirts works as good conductor
Two thin shirts become thicker so prevent transmission of heat
No radiation of heat takes place

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