Physics
An egg sinks in soft water but floats in a concentrated solution of salt because

Egg absorbs salt from the solution and expands
The density of salt solution exceeds the density of eggs
Water has high surface tension
Albumin dissolves in salt solution and egg becomes lighter

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

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

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