Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with same velocity on the earth
Their velocity increases and they fall with different velocity on the earth
They fall with that ultimate velocity, which are different for different droplets
They fall with same ultimate velocity

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

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