Physics
Pressure Cooker cooks faster because

Boiling point decreases with rise of pressure
Higher temperature is attained for cooking
The material of the cooker is a good conductor
It cooks the food at low pressure

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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.
It is narrow band of high-velocity wind.
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.

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