Physics
Which combination of colour is the most convenient during day and night time ?

Red and green
Organe and blue
Yellow and blue
White and black

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

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

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