Calculate the diode current at 25°c for a silicon diode with 7: = 30 JA and an applied forward bias of 0.7 V, Take n = 2 the ideality factor. ​

Sublimation- which change of state is shown in model

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared.