Logic gate Questions

Which logic gate is represented by the following combination of logic gates ?...

The given electrical network is equivalent to :

The given circuit indicate which logic gate -

A small block is shot into each of the four tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest...

The figure shows two NAND gates followed by a NOR gate. The system is equivalent to the following logic gate -...

Person A observes B moving in east direction with speed 10 m/s, B observes C moving in south direction with speed 20 m/s, C observes D moving in west direction with speed 30 m/ s & D observes a tree m...