High lift devices increase the lift produced by a wing, allowing the aircraft to operate at lower speed ranges usually for take off and landing.

An aerofoil when placed in a flow will (normally) cause said flow to accelerate over the aerofoil and decelerate below it.

This will cause a pressure differential between the upper and lower surface of the aerofoil, and the resultant force will be applied at the center of pressure.

Drag penalties (additional weight)

Less controllability

anhedral is the downward inclinitation of the wing from the root to the tip.

At FL260

TCAS works by sending interrogations to other aircraft's transponders.

The transponder will reply to the interrogation in a similar way it responds to radar. From the time difference between the interrogation and the reply, the distance to the other aircraft is calculated. The reply itself contains the altitude of the other aircraft.

The distance and the altitude difference with the other aircraft is tracked to identify a trend which may result in a TA or eventually a RA.

Lift, Drag, Weight and Thrust.

No

To varify the nose gear position (up or down).

By using the formula: Range (nm) = 1.23(√H1 + √H2)

H1=height of transmitter (feet)

H2=height of receiver (feet)