Domanda 96, Meteorology - ATPL - Airline Transport Pilot license

The wind speed is less than 10 kt and the air is heated by the earth's surface
The wind speed is greater than 10 kt and the condensation level is situated just above the turbulent layer
In the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer
Absolute instability exists at low level