Consider a bar of silicon having carrier concentration n0=1015 cm-3 and ni=1010cm-3. assume the excess carrier concentrations to be n=1013cm- 3, calculate the quasi-fermi energy level at t-300k? (a) 0.2982 ev (b) 0.2984 ev (c) 0.5971 ev (d) 1 ev

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Atomic nuclei of almost all elements consist of