Physics
Water cannot be used to extinguish fire caused by electric current, because

It may cause electrolysis
It may cause electrocution
It may spoil the wiring
It may cause hydrolysis

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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.
Jet streams are typically continuous over long distances.
It is narrow band of high-velocity wind.

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