Physics
One nanometer is equal to ________ meters.

10 raised to the power (-12)
10 raised to the power (-3)
10 raised to the power (-9)
10 raised to the power (-6)

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Physics
Mirage is due to:

Depletion of ozone layer in the atmosphere
Unequal heating of different parts of the atmosphere
Equal heating of different parts of the atmosphere
Magnetic disturbances in the atmosphere

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