Which semiconductors are used in each of the three parts of a PNP transistor?

A. The base and the emitter are p-type, and the collector is n-type.
B. The emitter and the collector are n-type, and the base is p-type.
C. The base and the collector are p-type, and the emitter is n-type.
D The collector and the emitter are p-type, and the base is n-type.

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?