Physics
Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be

At the same level in both
At a higher level in water
At a higher level in alcohol
Floating in alcohol and sinking in water

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Physics
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?

In summer, the polar front jet achieves its maximum force.
It follows the wave path near the tropopause at elevations of 8 km to 15 km.
It is narrow band of high-velocity wind.
Jet streams are typically continuous over long distances.

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Physics
The blue colour of sky is due to

Scattering of longer wavelengths of sunlight in the atmosphere
Scattering of shorter wavelengths of sunlight in the atmosphere
Refraction of sunlight
Reflection of sunlight

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