Silicon sample is 2.5 cm long and has a cross-sectional area of 0.1cm^2 . the silicon has an impurity concentration of nd=2×10^15 cm^-3 and na=0.
(a) calculate the thermal-equilibrium values of electron and hole concentrations
(b) calculate the conductivity and electron mobility if the resistance of the sample is measured to be 70 ω.
(c) if 2v bias is applied alone the length. calculate the drift current and current density.

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

The solid that is formed and usually sinks to the bottom of a solution is the