Both the carrier mobility and the diffusivity decrease as the doping concentration of silicon is increased. Table P3.11

provides a few data points for μn and μp versus doping

concentration. Use the Einstein relationship to obtain the

corresponding values for Dn and Dp.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.