Physics
When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will:

Double
Remain same
Four times
Three times

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Physics
It is dangerous to observe Solar eclipse with naked eyes because

Infrared radiations from sun burn our retina
Ultraviolet radiations from Sun burn our retina
Cosmic rays reach eyes more during the eclipse
All radiations from sun initiate chemical reactions in eyes

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