The speed is too low for an indication.

NDB’s are stations emitting a signal. There is nothing for them to be accurate about. ADF's on the other hand, when tuned to an NDB need to be accurate within +/- 5 degrees.

The critical angle of attack is the angle of attack which produces maximum lift coefficient.

This is also called the "stall angle of attack".

Their formation is most often triggered by freezing water vapour from the exhaust of aircraft engines.

No, there is no P-factor (asymmetric blade effect) as on a propeller-driven aircraft.

Reduced Vertical Separation Minima (RVSM) is the reduction, from 2,000 feet to 1,000 feet, of the standard vertical separation required between aircraft flying between flight level 290 (29,000 ft) and flight level 410 (41,000 ft).

Bright yellow lights will light up in the cockpit.

No, tropopause at the pole is lower (30.000ft) than at the equator (56.000ft)

Mach tuck is a nose-down pitching moment experienced as an aircraft passes Mcrit.

Mach tuck is a form of longitudinal instability that is caused by the centre of pressures rearward movement (caused by the shock wave) behind the centre of gravity.

NDB’s can suffer from a lot of errors.