We inject holes into a p-type semiconductor bar (na = 1017 cm-3 ) 180 nm long such that steady state total hole concentration changes from 1.5 x1017cm-3 to 1.1 x1017cm-3 from the starting point to the end point of the semiconductor bar. if the mobility of the holes is 500 cm2 /v-s, and the cross-sectional area is 0.5 cm-2 , what is the hole current at the middle of the semiconductor bar? sketch the hole concentration variation across the bar indicating relevant equations. (assume �p= 10-10 s)

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?