Physics
One nanometer is equal to ________ meters.

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

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Physics
Rainbows are produced when sunlight :

Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
None of the given statements is correct.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.

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Physics
Which of the following is not a property of heavy water ?

Density of heavy water is higher than that of ordinary water
Freezing point of heavy water is higher than that of ordinary water
It produces corrosion
Boiling point of heavy water is lower than that or ordinary water

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