Physics
A gas thermometer is more sensitive than a liquid thermometer because a gas :

Is lighter than liquid
Does not change state easily
Is easy to obtain
Expands more than a liquid

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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.
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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