- 10 minutes
- 4 minutes
- 15 minutes
- 1 minute
- Anemometer
- Battery
- Galvanometer
- Rectifier
- 1 g/cm3
- 1.5 g/cm3
- 2 g/cm3
- None of the above
- Trench
- Mariana Trench
- Mangrove
- Groove
- North pole
- South pole
- middle of the earth
- Equator
- 0.04%
- 3.90%
- 39%
- None of the above
- The scattering of sunlight by air molecules
- The presence of water vapor
- Absorption of blue light by the air
- Emission of blue light by the atmosphere
- Absorption and re-emission of visible light by the atmosphere
- Absorption and re-emission of ultraviolet radiation by the atmosphere
- Absorption and re-emission of infrared radiation by the atmosphere
- Absorption and re-emission of visible light by clouds
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