Physics
A bird sitting on a high tension electric wire does not get electrocuted because

It does not form a closed path for the flow of current
Its feet are good insulators
The body is earthed
It has high resistance

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Physics
A white and smooth surface is

Bad absorber and good reflector of heat
Good absorber and bad reflector of heat
Good absorber and good reflector of heat
Bad absorber and bad reflector of heat

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