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.
Jet streams are typically continuous over long distances.
It follows the wave path near the tropopause at elevations of 8 km to 15 km.
It is narrow band of high-velocity wind.

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Physics
Kinetic energy depends on

The mass of the moving body
The velocity or speed of the moving body.
Both mass and velocity of the moving body
The pressure of the moving body

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